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2D Structure
Also known as: Quadramet, Cyt-424, 160369-78-8, Samarium sm 153 lexidronam pentasodium, Quadramet (tn), Samarium sm 153 lexidronam pentasodium [usan]
Molecular Formula
C6H12N2Na5O12P4Sm
Molecular Weight
695.93  g/mol
InChI Key
SZZACTGRBZTAKY-NKNBZPHVSA-F
FDA UNII
7389YR3OOV

Samarium Sm-153 Lexidronam Pentasodium is the pentasodium salt of samarium Sm 153 lexidronam, a therapeutic agent consisting of a medium energy beta- and gamma-emitting radioisotope, samarium Sm 153, and a teraphosphonate chelator, ethylenediaminetetramethylene phosphonic acid (EDTMP). The chelator moiety of samarium Sm 153 lexidronam associates with hydroxyapatite crystals concentrated in areas of bone turnover, thereby selectively delivering samarium Sm 153-mediated cytotoxic radiation to osteoblastic bone metastases.
Samarium sm-153 lexidronam pentasodium is a Radioactive Therapeutic Agent. The mechanism of action of samarium sm-153 lexidronam pentasodium is as a Radiopharmaceutical Activity.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
pentasodium;samarium-153(3+);N,N,N',N'-tetrakis(phosphonatomethyl)ethane-1,2-diamine
2.1.2 InChI
InChI=1S/C6H20N2O12P4.5Na.Sm/c9-21(10,11)3-7(4-22(12,13)14)1-2-8(5-23(15,16)17)6-24(18,19)20;;;;;;/h1-6H2,(H2,9,10,11)(H2,12,13,14)(H2,15,16,17)(H2,18,19,20);;;;;;/q;5*+1;+3/p-8/i;;;;;;1+3
2.1.3 InChI Key
SZZACTGRBZTAKY-NKNBZPHVSA-F
2.1.4 Canonical SMILES
C(CN(CP(=O)([O-])[O-])CP(=O)([O-])[O-])N(CP(=O)([O-])[O-])CP(=O)([O-])[O-].[Na+].[Na+].[Na+].[Na+].[Na+].[Sm+3]
2.1.5 Isomeric SMILES
C(CN(CP(=O)([O-])[O-])CP(=O)([O-])[O-])N(CP(=O)([O-])[O-])CP(=O)([O-])[O-].[Na+].[Na+].[Na+].[Na+].[Na+].[153Sm+3]
2.2 Other Identifiers
2.2.1 UNII
7389YR3OOV
2.3 Synonyms
2.3.1 MeSH Synonyms

1. 153sm-edtmp

2. Quadramet

3. Samarate(5-)-153sm, (((1,2-ethanediylbis((nitrilo-kappa-n)bis(methylene)))tetrakis(phosphonato-kappa-o))(8-))-, Pentahydrogen, (oc-6-21)

4. Samarium (153sm) Lexidronam

5. Samarium Ethylenediaminetetramethylenephosphonate

6. Samarium Sm-153 Lexidronam

7. Samarium-153 Lexidronam

8. Samarium-153-edtmp

9. Sm-edtmp

2.3.2 Depositor-Supplied Synonyms

1. Quadramet

2. Cyt-424

3. 160369-78-8

4. Samarium Sm 153 Lexidronam Pentasodium

5. Quadramet (tn)

6. Samarium Sm 153 Lexidronam Pentasodium [usan]

7. Sm-153 Edtmp Pentasodium

8. 7389yr3oov

9. Samarium (153sm) Lexidronam Sodium (jan)

10. Samarium Sm 153 Lexidronam Pentasodium (usan)

11. Samarium Sm153 Lexidronam Pentasodium

12. Samarium (153sm) Lexidronam Sodium [jan]

13. Samarium Sm 153 Lexidronam Pentasodium Salt [mi]

14. Samarium (153sm) Lexidronam Pentasodium [ema Epar]

15. Samarium Sm-153 Lexidronam Pentasodium [orange Book]

16. Samarium (153sm) Lexidronam Sodium

17. Db09509

18. Samarium (153sm) Lexidronam Pentasodium

19. Samarium (153 Sm) Lexidronam Pentasodium

20. Samarium Sm 153 Lexidronam Pentasodium Salt

21. D05795

22. Q3470652

23. Samarium (153 Sm) Lexidronam Pentasodium [who-dd]

24. Pentasodium;samarium-153(3+);n,n,n',n'-tetrakis(phosphonatomethyl)ethane-1,2-diamine

2.4 Create Date
2006-10-25
3 Chemical and Physical Properties
Molecular Weight 695.93 g/mol
Molecular Formula C6H12N2Na5O12P4Sm
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count14
Rotatable Bond Count7
Exact Mass695.80502 g/mol
Monoisotopic Mass695.80502 g/mol
Topological Polar Surface Area259 Ų
Heavy Atom Count30
Formal Charge0
Complexity440
Isotope Atom Count1
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count7
4 Drug and Medication Information
4.1 Drug Indication

Quadramet is indicated for the relief of bone pain in patients with multiple painful osteoblastic skeletal metastases which take up technetium [99mTc]-labelled biphosphonates on bone scan.

The presence of osteoblastic metastases which take up technetium [99mTc]-labelled biphosphonates should be confirmed prior to therapy.


5 Pharmacology and Biochemistry
5.1 MeSH Pharmacological Classification

Analgesics, Non-Narcotic

A subclass of analgesic agents that typically do not bind to OPIOID RECEPTORS and are not addictive. Many non-narcotic analgesics are offered as NONPRESCRIPTION DRUGS. (See all compounds classified as Analgesics, Non-Narcotic.)


5.2 FDA Pharmacological Classification
5.2.1 Active Moiety
SAMARIUM SM-153 LEXIDRONAM PENTASODIUM
5.2.2 FDA UNII
7389YR3OOV
5.2.3 Pharmacological Classes
Mechanisms of Action [MoA] - Radiopharmaceutical Activity
5.3 ATC Code

V10BX02