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2D Structure
Also known as: 51264-14-3, M-amsa, Amsidine, Amsidyl, Acridinylanisidide, Lamasine
Molecular Formula
C21H19N3O3S
Molecular Weight
393.5  g/mol
InChI Key
XCPGHVQEEXUHNC-UHFFFAOYSA-N
FDA UNII
00DPD30SOY

An aminoacridine derivative that intercalates into DNA and is used as an antineoplastic agent.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
N-[4-(acridin-9-ylamino)-3-methoxyphenyl]methanesulfonamide
2.1.2 InChI
InChI=1S/C21H19N3O3S/c1-27-20-13-14(24-28(2,25)26)11-12-19(20)23-21-15-7-3-5-9-17(15)22-18-10-6-4-8-16(18)21/h3-13,24H,1-2H3,(H,22,23)
2.1.3 InChI Key
XCPGHVQEEXUHNC-UHFFFAOYSA-N
2.1.4 Canonical SMILES
COC1=C(C=CC(=C1)NS(=O)(=O)C)NC2=C3C=CC=CC3=NC4=CC=CC=C42
2.2 Other Identifiers
2.2.1 UNII
00DPD30SOY
2.3 Synonyms
2.3.1 MeSH Synonyms

1. Amsa

2. Amsa P D

3. Amsa P-d

4. Amsa Pd

5. Amsacrina

6. Amsidine

7. Amsidyl

8. Cain Acridine

9. Cain's Acridine

10. Cains Acridine

11. M-amsa

12. Meta Amsa

13. Meta-amsa

14. Nsc 141549

15. Nsc 156303

16. Nsc 249992

17. Nsc-141549

18. Nsc-156303

19. Nsc-249992

20. Nsc141549

21. Nsc156303

22. Nsc249992

23. Sn 11841

24. Sn-11841

25. Sn11841

2.3.2 Depositor-Supplied Synonyms

1. 51264-14-3

2. M-amsa

3. Amsidine

4. Amsidyl

5. Acridinylanisidide

6. Lamasine

7. Amekrin

8. Amsacrina

9. Mamsa

10. Acridinyl Anisidide

11. Amsacrinum

12. Amsine

13. 4'-(9-acridinylamino)methanesulfon-m-anisidide

14. Amsidil

15. 4'-(9-acridinylamino)-3'-methoxymethanesulfonanilide

16. Sn-11841

17. Ci-880

18. Nsc-249992

19. 4'-(9-acridinylamino)methanesulphon-m-anisidide

20. N-(4-(acridin-9-ylamino)-3-methoxyphenyl)methanesulfonamide

21. N-[4-(acridin-9-ylamino)-3-methoxyphenyl]methanesulfonamide

22. Nsc249992

23. Nsc 156303

24. Nsc 249992

25. Nsc-156303

26. 4'-(9-acridinylamino)methanesulfon-meta-anisidide

27. Sn 21429

28. M-amsa;acridinyl Anisidide

29. Methanesulfonamide, N-[4-(9-acridinylamino)-3-methoxyphenyl]-

30. Chembl43

31. N-(4-(9-acridinylamino)-3-methoxyphenyl)methanesulfonamide

32. N-[4-(9-acridinylamino)-3-methoxyphenyl]methanesulfonamide

33. Methanesulfonamide, N-(4-(9-acridinylamino)-3-methoxyphenyl)-

34. 00dpd30soy

35. Chebi:2687

36. Methanesulfonanilide, 4'-(9-acridinylamino)-3'-methoxy-

37. Meta-amsacrine

38. Methanesulfon-m-anisidide, 4'-(9-acridinylamino)-

39. Nci-249992

40. Sn-21429

41. N-[4-(acridin-9-ylamino)-3-(methyloxy)phenyl]methanesulfonamide

42. Amsacrinum [inn-latin]

43. Amsacrina [inn-spanish]

44. M-amsa Hydrochloride; Acridinyl Anisidide Hydrochloride

45. Amecrin

46. Mls002153376

47. Namsa

48. Amsidyl (tn)

49. Ccris 1027

50. Hsdb 7087

51. Amsacrine (usan/inn)

52. Smr000875352

53. Einecs 257-094-3

54. Ci 880

55. Unii-00dpd30soy

56. Amsa, M-

57. Brn 0500176

58. Amsacrine [usan:inn:ban]

59. Amsacrine [inn]

60. Amsacrine [mi]

61. Amsacrine [hsdb]

62. Amsacrine [iarc]

63. Amsacrine [usan]

64. Amsacrine [vandf]

65. Lopac-a-9809

66. Amsacrine [mart.]

67. Ncimech_000607

68. Amsacrine [who-dd]

69. Neuro_000118

70. Schembl4047

71. Lopac0_000154

72. 5-22-11-00030 (beilstein Handbook Reference)

73. Mls006010099

74. Cid_148673

75. Dtxsid4022604

76. Bdbm87351

77. Hms3748e05

78. N-[4-(9-acridinylamino)-3-methoxy-phenyl]methanesulfonamide

79. N-[4-(acridin-9-ylamino)-3-methoxy-phenyl]methanesulfonamide

80. Bca26414

81. Bcp08958

82. Zinc3812923

83. Ccg-35555

84. Mfcd00242748

85. Akos015917522

86. Cs-1942

87. Db00276

88. Sdccgsbi-0050142.p003

89. Ncgc00015113-01

90. Ncgc00015113-02

91. Ncgc00015113-03

92. Ncgc00015113-04

93. Ncgc00093644-10

94. Ncgc00162077-01

95. As-11665

96. Hy-13551

97. Nci60_001995

98. Smr000857391

99. Wln: T C666 Bnj Imr Bo1 Dmsw1

100. Db-082052

101. Ft-0708980

102. C01553

103. C75400

104. D02321

105. 4'-(9-acridinylamino)methanesulfonyl M-anisidide

106. 301a154

107. 4'-(9-acridinylamino)-methylsulfonyl-m-anisidine

108. A918341

109. Q2784004

110. Amsa;m-amsa;ci-880;sn-11841;acridinyl Anisidide

111. N-[4-(9-acridinylamino)-3-methoxyphenyl]methanesulfonamide;hydrochloride

112. N-[4-(acridin-9-ylamino)-3-methoxy-phenyl]methanesulfonamide;hydrochloride

113. N-{4-[(acridin-9-yl)amino]-3-methoxyphenyl}methanesulfonamide

114. Asw

2.4 Create Date
2005-03-25
3 Chemical and Physical Properties
Molecular Weight 393.5 g/mol
Molecular Formula C21H19N3O3S
XLogP34
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count6
Rotatable Bond Count5
Exact Mass393.11471265 g/mol
Monoisotopic Mass393.11471265 g/mol
Topological Polar Surface Area88.7 Ų
Heavy Atom Count28
Formal Charge0
Complexity601
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 Therapeutic Uses

Cytostatic agent with antiviral and immunosuppressive properties.

O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. 13th Edition, Whitehouse Station, NJ: Merck and Co., Inc., 2001., p. 100


Amsacrine is indicated for induction of remission in acute adult leukemia refractory to conventional therapy. /Included in US product labeling/

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 129


118 patients with acute leukemias, including initial, relapsed and refractory cases, were treated with domestic Amsacrine (m-AMSA), singly or combined with other drugs. The total CR rate was 39.5% in ALL and 38.8% in ANLL, the response rate was 47.5% for both types of acute leukemias. The CR rate of relapsed and refractory ALL and ANLL treated with combination chemotherapy including domestic m-AMSA was 30.8% and 46.2% respectively. Domestic m-AMSA was similar to the foreign product and many other antitumor drugs in side effects and toxicity. The pharmacokinetics parameters of the drugs, C12h/C6h,K21 and Cmax were correlated with the therapeutic effectiveness

Zhonghua Nei Ke Za Zhi 32(2): 80-84 (1993)


The synthetic aminoacridine derivative amsacrine (m-AMSA) is capable of preventing DNA from serving as a template in replication and DNA synthesis. This mechanism of action is similar to that of anthracyclines, but clinical evidence suggests the lack of cross-resistance. The recommended dosage in patients with solid tumors is 90-120 mg/sq m intravenously every 3-4 weeks. Despite the initial encouraging reports from experimental models, m-AMSA has shown no real impact in the treatment of patients with a wide variety of solid tumors. In relapsed acute nonlymphocytic leukemia, 20-30% of patients will achieve complete remission. An increased remission rate is obtained when m-AMSA is combined with other agents, especially with high-dose cytosine arabinoside, with a complete remission rate of 50-60% in relapsed patients. Currently, several phase III trials are evaluating m-AMSA combinations against daunorubicin-containing regimens in patients with previously untreated acute leukemia. The potential role of these regimens in this disease remains to be defined.

PMID:2582401 Hornedo J et al; Pharmacotherapy 5(2): 78-90 (1985)


For more Therapeutic Uses (Complete) data for AMSACRINE (7 total), please visit the HSDB record page.


4.2 Drug Warning

Human systemic effects by intravenous route: nausea or vomiting, thrombosis distant from the injection site, and bone marrow changes.

Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 9th ed. Volumes 1-3. New York, NY: Van Nostrand Reinhold, 1996., p. 54


Although very little information is available regarding distribution of antineoplastic agents into breast milk, breast-feeding is not recommended during chemotherapy because of the potential risks to the infant (adverse effects, mutagenicity, carcinogenicity).

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 130


No information is available on the relationship of age to the effects of amsacrine in geriatric patients. However, elderly patients are more likely to have age-related renal function impairment, which may require adjustment of dosage in patients receiving amsacrine.

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 130


The bone marrow depressant effects of amsacrine may result in an increased incidence of microbial infection, delayed healing, and gingival bleeding. Dental work, whenever possible, should be completed prior to initiation of therapy or deferred until blood counts have returned to normal. Patients should be instructed in proper oral hygiene, including caution in use of regular toothbrushes, dental floss, and toothpicks.

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 130


For more Drug Warnings (Complete) data for AMSACRINE (19 total), please visit the HSDB record page.


4.3 Drug Indication

For treatment of acute myeloid leukaemia.


5 Pharmacology and Biochemistry
5.1 Pharmacology

Amsacrine is an aminoacridine derivative that is a potent intercalating antineoplastic agent. It is effective in the treatment of acute leukemias and malignant lymphomas, but has poor activity in the treatment of solid tumors. It is frequently used in combination with other antineoplastic agents in chemotherapy protocols. It produces consistent but acceptable myelosuppression and cardiotoxic effects.


5.2 MeSH Pharmacological Classification

Antineoplastic Agents

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


Intercalating Agents

Agents that are capable of inserting themselves between the successive bases in DNA, thus kinking, uncoiling or otherwise deforming it and therefore preventing its proper functioning. They are used in the study of DNA. (See all compounds classified as Intercalating Agents.)


5.3 ATC Code

L - Antineoplastic and immunomodulating agents

L01 - Antineoplastic agents

L01X - Other antineoplastic agents

L01XX - Other antineoplastic agents

L01XX01 - Amsacrine


5.4 Absorption, Distribution and Excretion

Absorption

Poorly absorbed


Volume of distribution (VolD) -- 1.67 L/kg. Amsacrine does not significantly penetrate into the CNS

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 129


Elimination: Renal: 35% of the dose is excreted by the kidneys within 72 hours after administration (20% as intact drug). Biliary: Amsacrine is also eliminated by biliary excretion.

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 130


In cancer patients, amsacrine undergoes biphasic elimination, with a distribution half-life of 0.25-1.6 hours and an elimination half-time of 4.7-9 hours. The total plasma clearance rate is 200-300 ml/min per sq m, and the apparent distribution volume is 70-110 l/sq m, suggesting concentration in tissues. During a 1 hour injusion of amasacrine at 90-200 mg/sq m, the peak plasma concentration was 10-15 umol/l.

IARC. Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. Geneva: World Health Organization, International Agency for Research on Cancer, 1972-PRESENT. (Multivolume work). Available at: https://monographs.iarc.fr/ENG/Classification/index.php, p. V76 321 (2000)


Although not fully reported, early trials in which amsacrine was given orally failed to reach the maximum tolerated dose, as shown by lack of toxicity even at doses as high as 500 mg/sq m per day, suggesting incomplete or erratic absorption. In subsequent studies, the intravenous route was used, with which the maximum tolerated dose in patients with solid tumors is 100-150 mg/sq m when administered over 1-3 hours.

IARC. Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. Geneva: World Health Organization, International Agency for Research on Cancer, 1972-PRESENT. (Multivolume work). Available at: https://monographs.iarc.fr/ENG/Classification/index.php, p. V76 321 (2000)


After intravenous administration of (14)C amsacrine to mice and rats, > 50% of the radiolabel was excreted in bile within the first 2 hours, and the bile:plasma ratio was > 400:1; 74% of an intravenous dose was excreted in the feces of mice with 72 hours. These studies demonstrate the importance of the liver in clearance of amsacrine.

IARC. Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. Geneva: World Health Organization, International Agency for Research on Cancer, 1972-PRESENT. (Multivolume work). Available at: https://monographs.iarc.fr/ENG/Classification/index.php, p. V76 322 (2000)


5.5 Metabolism/Metabolites

Extensive, primarily hepatic, converted to glutathione conjugate.


Oxidative metabolism of the anti-cancer drug amsacrine 4'-(9-acridinylamino) methane-sulphan-m-anisidide has been suggested to account for its cytotoxicity. However, enzymes capable of oxidizing it in non-hepatic tissue have yet to be identified. A potential candidate, that may be relevant to the metabolism of amsacrine in blood and its action in myeloid leukaemias and myelosuppression, is the haem enzyme myeloperoxidase. We have found that the purified human enzyme oxidizes amsacrine to its quinone diimine, either directly or through the production of hypochlorous acid. In comparison, the 4-methyl-5-methylcarboxamide derivative of amsacrine, CI-921 9-[[2-methoxy-4[(methylsulphonyl)-amino]phenyl]amino)-N, 5-dimethyl-4-acridine carboxamide, reacted poorly with myeloperoxidase, although it was oxidized by hypochlorous acid. Detailed studies of the mechanism by which myeloperoxidase oxidizes amsacrine revealed that the semiquinone imine free radical is a likely intermediate in this reaction. Oxidation of amsacrine analogues indicated that factors other than their reduction potential determine how readily they are metabolized by myeloperoxidase. Both amsacrine and CI-921 inhibited production of hypochlorous acid by myeloperoxidase. CI-921 acted by trapping the enzyme as the inactive redox intermediate compound II. Amsacrine inhibited by a different mechanism that may involve conversion of myeloperoxidase to compound III, which is also unable to oxidize Cl-. The susceptibility of amsacrine to oxidation by myeloperoxidase indicates that this reaction may contribute to the cytotoxicity of amsacrine toward neutrophils, monocytes and their precursors.

PMID:1333205 Kettle AJ et al; Biochem Pharmacol 44(9): 1731-1738 (1992)


In mouse bile, 5'- and 6'-glutathione conjugates were present in roughly equal amounts and accounted for 70% of the excreted biliary radiolabel after administration of radiolabelled amsacrine. In rats, the principal biliary metabolite was the 5'-gutathione conjugate, which accounted for 80% of the excreted radiolabel within the first 90 minutes and > 50% of the administered dose over 3 hours. The 6'-conjugate was also subsequently identified in rat bile. In rat liver microsomes and human neutrophils, intermediate oxidation products have been identified as N1'-methanesulfonyl-N4'-(9-acridinyl)-3'-methoxy-2',5'-cyclohexadience-1',4'-dii mine and 3'-methoxy-4'-(9-acridinylamino-2'5'-cyclohexadien-1'-one.

IARC. Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. Geneva: World Health Organization, International Agency for Research on Cancer, 1972-PRESENT. (Multivolume work). Available at: https://monographs.iarc.fr/ENG/Classification/index.php, p. V76 322 (2000)


5.6 Biological Half-Life

8-9 hours


5.7 Mechanism of Action

Amsacrine binds to DNA through intercalation and external binding. It has a base specificity for A-T pairs. Rapidly dividing cells are two to four times more sensitive to amsacrine than are resting cells. Amsacrine appears to cleave DNA by inducing double stranded breaks. Amsacrine also targets and inhibits topoisomerase II. Cytotoxicity is greatest during the S phase of the cell cycle when topoisomerase levels are at a maximum.


Amsacrine binds to DNA through intercalation and external binding and has base specificity for A-T pairs. Cycling cells are two to four times more sensitive to amsacrine than are resting cells. Cells initially in S and G2 phases are grossly delayed in their capacity for normal progression, leading to an accumulation of cells in the S phase, followed at later times by arrest in the G2 phase.

MICROMEDEX Thomson Health Care. USPDI - Drug Information for the Health Care Professional. 22nd ed. Volume 1. MICROMEDEX Thomson Health Care, Greenwood Village, CO. 2002. Content Reviewed and Approved by the U.S. Pharmacopeial Convention, Inc., p. 129


Cytotoxicity of several classes of antitumor DNA intercalators is thought to result from disturbance of DNA metabolism following trapping of the nuclear enzyme DNA topoisomerase II as a covalent complex on DNA. Here, molecular interactions of the potent antitumor drug amsacrine (m-AMSA), an inhibitor of topoisomerase II, within living K562 cancer cells have been studied using surface-enhanced Raman (SER) spectroscopy. The work is based on data of the previously performed model SER experiments dealing with amsacrine/DNA, drug/topoisomerase II and drug/DNA/topoisomerase II complexes in aqueous buffer solutions. The SER data indicated two kinds of amsacrine interactions in the model complexes with topoisomerase II alone or within ternary complex: non-specific (via the acridine moiety) and specific to the enzyme conformation (via the side chain of the drug). These two types of interactions have been both revealed by the micro-SER spectra of amsacrine within living K562 cancer cells. Our data suppose the specific interactions of amsacrine with topoisomerase II via the side chain of the drug (particular feature of the drug/topoisomerase II and ternary complexes) to be crucial for its inhibitory activity.

Chourpa I et al; FESBS Letters 397(1): 61-64 (1996)