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2D Structure
Also known as: 149647-78-9, Saha, Suberoylanilide hydroxamic acid, Zolinza, N-hydroxy-n'-phenyloctanediamide, N1-hydroxy-n8-phenyloctanediamide
Molecular Formula
C14H20N2O3
Molecular Weight
264.32  g/mol
InChI Key
WAEXFXRVDQXREF-UHFFFAOYSA-N
FDA UNII
58IFB293JI

A hydroxamic acid and anilide derivative that acts as a HISTONE DEACETYLASE inhibitor. It is used in the treatment of CUTANEOUS T-CELL LYMPHOMA and SEZARY SYNDROME.
Vorinostat is a Histone Deacetylase Inhibitor. The mechanism of action of vorinostat is as a Histone Deacetylase Inhibitor.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
N'-hydroxy-N-phenyloctanediamide
2.1.2 InChI
InChI=1S/C14H20N2O3/c17-13(15-12-8-4-3-5-9-12)10-6-1-2-7-11-14(18)16-19/h3-5,8-9,19H,1-2,6-7,10-11H2,(H,15,17)(H,16,18)
2.1.3 InChI Key
WAEXFXRVDQXREF-UHFFFAOYSA-N
2.1.4 Canonical SMILES
C1=CC=C(C=C1)NC(=O)CCCCCCC(=O)NO
2.2 Other Identifiers
2.2.1 UNII
58IFB293JI
2.3 Synonyms
2.3.1 MeSH Synonyms

1. 18f Suberoylanilide Hydroxamic Acid

2. 18f-saha

3. 18f-suberoylanilide Hydroxamic Acid

4. M344

5. Mk 0683

6. Mk-0683

7. Mk0683

8. N Hydroxy N' Phenyloctanediamide

9. N-hydroxy-n'-phenyloctanediamide

10. N1 Hydroxy N8 Phenyloctanediamide

11. N1-hydroxy-n8-phenyloctanediamide

12. Nhnpoda

13. Suberanilohydroxamic Acid

14. Suberoyl Anilide Hydroxamic Acid

15. Suberoylanilide Hydroxamic Acid

16. Zolinza

2.3.2 Depositor-Supplied Synonyms

1. 149647-78-9

2. Saha

3. Suberoylanilide Hydroxamic Acid

4. Zolinza

5. N-hydroxy-n'-phenyloctanediamide

6. N1-hydroxy-n8-phenyloctanediamide

7. Suberanilohydroxamic Acid

8. Mk-0683

9. Mk0683

10. Octanediamide, N-hydroxy-n'-phenyl-

11. N'-hydroxy-n-phenyloctanediamide

12. Vorinostat (saha, Mk0683)

13. Octanedioic Acid Hydroxyamide Phenylamide

14. Ccris 8456

15. N-hyrdroxy-n'-phenyloctanediamide

16. Nsc-701852

17. Vorinostat (saha)

18. Shh

19. Chembl98

20. Mfcd00945317

21. Nsc-748799

22. Nsc-759852

23. 58ifb293ji

24. Chebi:45716

25. N1-hydroxy-n8-phenyl-octanediamide

26. Win64652

27. Nsc701852

28. Saha Cpd

29. Ncgc00168085-01

30. Ncgc00168085-02

31. Vorinostat [usan]

32. Zolinza (tn) (merck)

33. Saha-d5

34. Dsstox_cid_21133

35. Dsstox_rid_79632

36. Dsstox_gsid_41133

37. N-hydroxy-n'-phenyl-octane-1,8-diotic Acid Diamide

38. Vorinostat Msd

39. Smr000486344

40. Zolinza (tn)

41. Cas-149647-78-9

42. Sr-05000000373

43. Vorinostat (jan/usan)

44. Vorinostat [usan:inn]

45. Mk 0683

46. Vorinostatum

47. Unii-58ifb293ji

48. Suberoylanilidehydroxamic Acid

49. Ski390

50. Hsdb 7930

51. 4lxz

52. Vorinostat(saha)

53. Zolinza; Saha

54. Vorinostat - Saha

55. Saha, Suberoylanilide Hydroxamic Acid

56. 1zz1

57. Vorinostat [mi]

58. Sw-064652

59. Vorinostat [inn]

60. Vorinostat [jan]

61. 8-(hydroxyamino)-8-oxo-n-phenyl-octanamide

62. Vorinostat [vandf]

63. Cid_5311

64. Schembl9018

65. Vorinostat [mart.]

66. Vorinostat [who-dd]

67. Mls001065855

68. Mls006011941

69. Gtpl6852

70. Dtxsid6041133

71. Vorinostat [orange Book]

72. Bdbm19149

73. Vorinostat (saha; Mk0683)

74. Suberanilohydroxaminic Acid

75. 1t69

76. N-hydroxy-n''-phenyloctanediamide

77. Bcpp000018

78. Hms2219l20

79. Hms3264d20

80. Hms3327c12

81. Hms3426g03

82. Hms3650d09

83. Hms3654g11

84. Hms3715e22

85. Hms3745m03

86. Pharmakon1600-01502267

87. Bcp01858

88. Ex-a2745

89. Saha, >=98% (hplc)

90. Vorinostat,saha,zolinza,mk-0683

91. Zinc1543873

92. Tox21_112605

93. Tox21_113623

94. Vorinostat,cas:149647-78-9

95. Nsc748799

96. Nsc759852

97. Octanediamide, N1-hydroxy-n8-phenyl

98. S1047

99. Sk1390

100. Akos015966648

101. Octanediamide, N1-hydroxy-n8-phenyl-

102. Tox21_112605_1

103. Ac-1923

104. Ccg-208659

105. Cs-0589

106. Db02546

107. Dg-0025

108. Nsc 701852

109. Nsc 748799

110. Nsc 759852

111. Sb17319

112. Suberoylanilide Hydroxamic Acid (saha)

113. Ncgc00168085-03

114. Ncgc00168085-04

115. Ncgc00168085-05

116. Ncgc00168085-13

117. Bp-25652

118. Bp-30216

119. Bv164560

120. Hy-10221

121. Sy009383

122. Am20030018

123. Ft-0650593

124. H1388

125. Sw199536-4

126. Ec-000.2057

127. D06320

128. Ab00375377-07

129. Ab00375377-08

130. Ab00375377-09

131. Ab01644613_25

132. 647s789

133. A808935

134. Q905901

135. Vorinostat, Saha, Suberoylanilide Hydroxamic Acid

136. Sr-05000000373-2

137. Sr-05000000373-6

138. Sr-05000000373-8

139. W-201327

140. Brd-k81418486-001-01-2

141. Brd-k81418486-001-10-3

142. Brd-k81418486-001-12-9

143. Brd-k81418486-001-13-7

144. Brd-k81418486-001-17-8

145. Brd-k81418486-001-18-6

146. Z1541632802

147. N-hydroxy-n Inverted Exclamation Mark -phenyloctanediamide

148. 1227736-21-1

2.4 Create Date
2005-03-25
3 Chemical and Physical Properties
Molecular Weight 264.32 g/mol
Molecular Formula C14H20N2O3
XLogP31.9
Hydrogen Bond Donor Count3
Hydrogen Bond Acceptor Count3
Rotatable Bond Count8
Exact Mass264.14739250 g/mol
Monoisotopic Mass264.14739250 g/mol
Topological Polar Surface Area78.4 Ų
Heavy Atom Count19
Formal Charge0
Complexity276
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1
4 Drug and Medication Information
4.1 Drug Information
1 of 2  
Drug NameZolinza
PubMed HealthVorinostat (By mouth)
Drug ClassesAntineoplastic Agent
Drug LabelZOLINZA contains vorinostat, which is described chemically as N-hydroxy-N'-phenyloctanediamide. The empirical formula is C14H20N2O3. The molecular weight is 264.32 and the structural formula is:Vorinostat is a white to light orange powder. It is very
Active IngredientVorinostat
Dosage FormCapsule
RouteOral
Strength100mg
Market StatusPrescription
CompanyMerck

2 of 2  
Drug NameZolinza
PubMed HealthVorinostat (By mouth)
Drug ClassesAntineoplastic Agent
Drug LabelZOLINZA contains vorinostat, which is described chemically as N-hydroxy-N'-phenyloctanediamide. The empirical formula is C14H20N2O3. The molecular weight is 264.32 and the structural formula is:Vorinostat is a white to light orange powder. It is very
Active IngredientVorinostat
Dosage FormCapsule
RouteOral
Strength100mg
Market StatusPrescription
CompanyMerck

4.2 Therapeutic Uses

Antineoplastic Agents; Histone Deacetylase Inhibitors

National Library of Medicine's Medical Subject Headings online file (MeSH, 2009)


Vorinostat is indicated for the treatment of cutaneous manifestations in patients with cutaneous T-cell lymphoma who have progressive, persistent or recurrent disease on or following two systemic therapies. /Included in US product label/

US Natl Inst Health; DailyMed. Current Medication Information for ZOLINZA (vorinostat) capsule (October 2010). Available from, as of July 11, 2011: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=cd86ee78-2781-468b-930c-3c4677bcc092


4.3 Drug Warning

Risk of pulmonary embolism and deep-vein thrombosis. Clinicians should be alert to signs and symptoms of such effects, especially in patients with a prior history of thromboembolic events.

American Society of Health-System Pharmacists 2011; Drug Information 2011. Bethesda, MD. 2011, p. 1275


Risk of dose-related thrombocytopenia and anemia. Dosage should be adjusted or therapy discontinued if thrombocytopenia or anemia occurs.

American Society of Health-System Pharmacists 2011; Drug Information 2011. Bethesda, MD. 2011, p. 1275


Risk of nausea, vomiting, and diarrhea; antiemetic and/or antidiarrheal agents may be required. To prevent dehydration, fluid and electrolyte replacement should be administered. Preexisting nausea, vomiting, and diarrhea should be adequately controlled before initiating therapy.

American Society of Health-System Pharmacists 2011; Drug Information 2011. Bethesda, MD. 2011, p. 1275


Risk of hyperglycemia. Serum glucose concentrations should be monitored, especially in patients with known or possible diabetes mellitus. Diet and/or antidiabetic therapy should be adjusted, if needed.

American Society of Health-System Pharmacists 2011; Drug Information 2011. Bethesda, MD. 2011, p. 1275


For more Drug Warnings (Complete) data for Vorinostat (23 total), please visit the HSDB record page.


4.4 Drug Indication

For the treatment of cutaneous manifestations in patients with cutaneous T-cell lymphoma who have progressive, persistent or recurrent disease on or following two systemic therapies.


Malignant pleural mesothelioma, Treatment of Cutaneous T-Cell Lymphoma


5 Pharmacology and Biochemistry
5.1 MeSH Pharmacological Classification

Antineoplastic Agents

Substances that inhibit or prevent the proliferation of NEOPLASMS. (See all compounds classified as Antineoplastic Agents.)


Histone Deacetylase Inhibitors

Compounds that inhibit HISTONE DEACETYLASES. This class of drugs may influence gene expression by increasing the level of acetylated HISTONES in specific CHROMATIN domains. (See all compounds classified as Histone Deacetylase Inhibitors.)


5.2 FDA Pharmacological Classification
5.2.1 Active Moiety
VORINOSTAT
5.2.2 FDA UNII
58IFB293JI
5.2.3 Pharmacological Classes
Histone Deacetylase Inhibitors [MoA]; Histone Deacetylase Inhibitor [EPC]
5.3 ATC Code

L - Antineoplastic and immunomodulating agents

L01 - Antineoplastic agents

L01X - Other antineoplastic agents

L01XH - Histone deacetylase (hdac) inhibitors

L01XH01 - Vorinostat


5.4 Absorption, Distribution and Excretion

Route of Elimination

In vitro studies using human liver microsomes indicate negligible biotransformation by cytochromes P450 (CYP). Vorinostat is eliminated predominantly through metabolism with less than 1% of the dose recovered as unchanged drug in urine, indicating that renal excretion does not play a role in the elimination of vorinostat. However, renal excretion does not play a role in the elimination of vorinostat.


The pharmacokinetics of vorinostat were evaluated in 23 patients with relapsed or refractory advanced cancer. After oral administration of a single 400-mg dose of vorinostat with a high-fat meal, the mean +/- standard deviation area under the curve (AUC) and peak serum concentration (Cmax) and the median (range) time to maximum concentration (Tmax) were 5.5+/-1.8 uM.hr, 1.2+/-0.62 uM and 4 (2-10) hours, respectively.

US Natl Inst Health; DailyMed. Current Medication Information for ZOLINZA (vorinostat) capsule (October 2010). Available from, as of July 11, 2011: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=cd86ee78-2781-468b-930c-3c4677bcc092


In the fasted state, oral administration of a single 400-mg dose of vorinostat resulted in a mean AUC and Cmax and median Tmax of 4.2+/-1.9 uM.hr and 1.2+/-0.35 uM and 1.5 (0.5-10) hours, respectively. Therefore, oral administration of vorinostat with a high-fat meal resulted in an increase (33%) in the extent of absorption and a modest decrease in the rate of absorption (Tmax delayed 2.5 hours) compared to the fasted state. However, these small effects are not expected to be clinically meaningful. In clinical trials of patients with CTCL, vorinostat was taken with food.

US Natl Inst Health; DailyMed. Current Medication Information for ZOLINZA (vorinostat) capsule (October 2010). Available from, as of July 11, 2011: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=cd86ee78-2781-468b-930c-3c4677bcc092


At steady state in the fed-state, oral administration of multiple 400-mg doses of vorinostat resulted in a mean AUC and Cmax and a median Tmax of 6.0+/-2.0 uM.hr, 1.2+/-0.53 uM and 4 (0.5-14) hours, respectively.

US Natl Inst Health; DailyMed. Current Medication Information for ZOLINZA (vorinostat) capsule (October 2010). Available from, as of July 11, 2011: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=cd86ee78-2781-468b-930c-3c4677bcc092


Vorinostat is approximately 71% bound to human plasma proteins over the range of concentrations of 0.5 to 50 ug/mL.

US Natl Inst Health; DailyMed. Current Medication Information for ZOLINZA (vorinostat) capsule (October 2010). Available from, as of July 11, 2011: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=cd86ee78-2781-468b-930c-3c4677bcc092


For more Absorption, Distribution and Excretion (Complete) data for Vorinostat (9 total), please visit the HSDB record page.


5.5 Metabolism/Metabolites

The major pathways of vorinostat metabolism involve glucuronidation and hydrolysis followed by -oxidation. Human serum levels of two metabolites, O-glucuronide of vorinostat and 4-anilino-4-oxobutanoic acid were measured. Both metabolites are pharmacologically inactive. Compared to vorinostat, the mean steady state serum exposures in humans of the O-glucuronide of vorinostat and 4-anilino-4-oxobutanoic acid were 4-fold and 13-fold higher, respectively. In vitro studies using human liver microsomes indicate negligible biotransformation by cytochromes P450 (CYP).


Vorinostat is extensively metabolized to inactive metabolites, principally by glucuronidation and hydrolysis followed by beta-oxidation. The drug is not metabolized by cytochrome P-450 (CYP) isoenzymes.

American Society of Health-System Pharmacists 2011; Drug Information 2011. Bethesda, MD. 2011, p. 1276


The major pathways of vorinostat metabolism involve glucuronidation and hydrolysis followed by beta-oxidation. Human serum levels of two metabolites, O-glucuronide of vorinostat and 4-anilino-4-oxobutanoic acid were measured. Both metabolites are pharmacologically inactive. Compared to vorinostat, the mean steady state serum exposures in humans of the O-glucuronide of vorinostat and 4-anilino-4-oxobutanoic acid were 4-fold and 13-fold higher, respectively.

US Natl Inst Health; DailyMed. Current Medication Information for ZOLINZA (vorinostat) capsule (October 2010). Available from, as of July 11, 2011: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=cd86ee78-2781-468b-930c-3c4677bcc092


The mean urinary recovery of two pharmacologically inactive metabolites at steady state was 16+/-5.8% of vorinostat dose as the O glucuronide of vorinostat, and 36+/-8.6% of vorinostat dose as 4-anilino-4-oxobutanoic acid. Total urinary recovery of vorinostat and these two metabolites averaged 52+/-13.3% of vorinostat dose.

US Natl Inst Health; DailyMed. Current Medication Information for ZOLINZA (vorinostat) capsule (October 2010). Available from, as of July 11, 2011: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=cd86ee78-2781-468b-930c-3c4677bcc092


5.6 Biological Half-Life

2 hours


... Patients (n = 23) received single doses of 400 mg vorinostat on day 1 (fasted) and day 5 (fed) with 48 hours of pharmacokinetic sampling on both days. Patients received 400 mg vorinostat once daily on days 7 to 28. On day 28, vorinostat was given (fed) with pharmacokinetic sampling for 24 hours after dose. The apparent t(1/2) of vorinostat was short (approximately 1.5 hours). ...

PMID:17145826 Rubin EH et al; Clin Cancer Res 12 (23): 7039-45 (2006)


The mean terminal half-life was /approximately/ 2.0 hours for both vorinostat and the O-glucuronide metabolite, while that of the 4-anilino-4-oxobutanoic acid metabolite was 11 hours.

US Natl Inst Health; DailyMed. Current Medication Information for ZOLINZA (vorinostat) capsule (October 2010). Available from, as of July 11, 2011: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=cd86ee78-2781-468b-930c-3c4677bcc092


5.7 Mechanism of Action

Vorinostat inhibits the enzymatic activity of histone deacetylases HDAC1, HDAC2 and HDAC3 (Class I) and HDAC6 (Class II) at nanomolar concentrations (IC50< 86 nM). These enzymes catalyze the removal of acetyl groups from the lysine residues of histones proteins. In some cancer cells, there is an overexpression of HDACs, or an aberrant recruitment of HDACs to oncogenic transcription factors causing hypoacetylation of core nucleosomal histones. By inhibiting histone deacetylase, vorinostat causes the accumulation of acetylated histones and induces cell cycle arrest and/or apoptosis of some transformed cells. The mechanism of the antineoplastic effect of vorinostat has not been fully characterized.


Vorinostat, a histone deacetylase inhibitor, is an antineoplastic agent. The mechanism of the antineoplastic effect of vorinostat has not been fully characterized. Vorinostat inhibits the enzymatic activity of histone deacetylases HDAC1, HDAC2, and HDAC3 (Class I) and HDAC6 (Class II) at nanomolar concentrations. HDAC enzymes catalyze the removal of acetyl groups from the lysine residues of proteins, including histones and transcription factors. Overexpression of HDAC enzymes or aberrant recruitment of HDAC enzymes to oncogenic transcription factors causing hypoacetylation of core nucleosomal histones has been observed in some cancer cells. Hypoacetylation of histones is associated with a condensed chromatin structure and repression of gene transcription. Inhibition of HDAC activity allows for the accumulation of acetyl groups on the histone lysine residues, resulting in an open chromatin structure and transcriptional activation. In vitro, vorinostat causes the accumulation of acetylated histones and induces cell cycle arrest and/or apoptosis of some transformed cells.

American Society of Health-System Pharmacists 2011; Drug Information 2011. Bethesda, MD. 2011, p. 1276


Although the pathophysiological processes involved in dopamine (DA) neuron degeneration in Parkinson's disease (PD) are not completely known, apoptotic cell death has been suggested to be involved and can be modeled in DAergic cell lines using the mitochondrial toxin 1-methyl-4-phenylpyridinium (MPP(+)). Recently, it has been suggested that histone deacetylase inhibitors (HDACIs) may reduce apoptotic cell death in various model systems. However, their utility in interfering with DA cell death remains unclear. The HDACIs sodium butyrate (NaB), valproate (VPA) and suberoylanilide hydroxamic acid (SAHA) were tested for their ability to prevent MPP(+)-mediated cytotoxicity in human derived SK-N-SH and rat derived MES 23.5 cells. All three HDACIs at least partially prevented MPP(+)-mediated apoptotic cell death. The protective effects of these HDACIs coincided with significant increases in histone acetylation. These results suggest that HDACIs may be potentially neuroprotective against DA cell death ...

PMID:20654591 Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2941155 Kidd SK, Schneider JS; Brain Res 1354: 172-8 (2010)


Histone deacetylase inhibitors (HDACi) developed as anti-cancer agents have a high degree of selectivity for killing cancer cells. HDACi induce acetylation of histones and nonhistone proteins, which affect gene expression, cell cycle progression, cell migration, and cell death. The mechanism of the tumor selective action of HDACi is unclear. Here, /the authors/ show that the HDACi, vorinostat (Suberoylanilide hydroxamic acid, SAHA), induces DNA double-strand breaks (DSBs) in normal (HFS) and cancer (LNCaP, A549) cells. Normal cells in contrast to cancer cells repair the DSBs despite continued culture with vorinostat. In transformed cells, phosphorylated H2AX (gammaH2AX), a marker of DNA DSBs, levels increased with continued culture with vorinostat, whereas in normal cells, this marker decreased with time. Vorinostat induced the accumulation of acetylated histones within 30 min, which could alter chromatin structure-exposing DNA to damage. After a 24-hr culture of cells with vorinostat, and reculture without the HDACi, gammaH2AX was undetectable by 2 hr in normal cells, while persisting in transformed cells for the duration of culture. Further, /investigators/ found that vorinostat suppressed DNA DSB repair proteins, e.g., RAD50, MRE11, in cancer but not normal cells. Thus, the HDACi, vorinostat, induces DNA damage which normal but not cancer cells can repair. This DNA damage is associated with cancer cell death. These findings can explain, in part, the selectivity of vorinostat in causing cancer cell death at concentrations that cause little or no normal cell death.

PMID:20679231 Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2930422 Lee JH et al; Proc Natl Acad Sci U S A 107 (33): 14639-44 (2010)


... Some histone deacetylase inhibitors, such as trichostatin A and scriptaid, have improved the full-term development of mouse clones significantly, but the mechanisms allowing for this are unclear. Here, /the authors/ found that two other specific inhibitors, suberoylanilide hydroxamic acid and oxamflatin, could also reduce the rate of apoptosis in blastocysts, improve the full-term development of cloned mice, and increase establishment of nuclear transfer-generated embryonic stem cell lines significantly without leading to obvious abnormalities. However, another inhibitor, valproic acid, could not improve cloning efficiency. Suberoylanilide hydroxamic acid, oxamflatin, trichostatin A, and scriptaid are inhibitors for classes I and IIa/b histone deacetylase, whereas valproic acid is an inhibitor for classes I and IIa, suggesting that inhibiting class IIb histone deacetylase is an important step for reprogramming mouse cloning efficiency.

PMID:20686182 Ono T et al; Biol Reprod 83 (6): 929-37 (2010)


For more Mechanism of Action (Complete) data for Vorinostat (23 total), please visit the HSDB record page.