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Exemestane information


Exemestane
Clinical data
Pronunciation/ˌɛksəˈmɛˌstn/
EK-sə-ME-stayn
Trade namesAromasin
Other namesFCE-24304
AHFS/Drugs.comMonograph
MedlinePlusa607006
Routes of
administration
By mouth
Drug classAromatase inhibitor; Antiestrogen
ATC code
  • L02BG06 (WHO)
Legal status
Legal status
  • UK: POM (Prescription only)[1]
  • US: ℞-only
Pharmacokinetic data
Bioavailability~60%[citation needed]
Protein binding90%
MetabolismLiver (CYP3A4, aldo-keto reductase)
Elimination half-life24 hours
Duration of action4–5 days[citation needed]
ExcretionUrine and feces ~ 1:1 (mainly metabolites)
Identifiers
IUPAC name
  • 6-Methylideneandrosta-1,4-diene-3,17-dione[2]
CAS Number
  • 107868-30-4 checkY
PubChem CID
  • 60198
IUPHAR/BPS
  • 7073
DrugBank
  • DB00990 checkY
ChemSpider
  • 54278 checkY
UNII
  • NY22HMQ4BX
KEGG
  • D00963 checkY
ChEBI
  • CHEBI:4953 ☒N
ChEMBL
  • ChEMBL1200374 checkY
CompTox Dashboard (EPA)
  • DTXSID5023037 Edit this at Wikidata
ECHA InfoCard100.171.149 Edit this at Wikidata
Chemical and physical data
FormulaC20H24O2
Molar mass296.410 g·mol−1
3D model (JSmol)
  • Interactive image
SMILES
  • O=C\1\C=C/[C@]3(C(=C/1)/C(=C)C[C@H]4[C@@H]2CCC(=O)[C@]2(CC[C@H]34)C)C
InChI
  • InChI=1S/C20H24O2/c1-12-10-14-15-4-5-18(22)20(15,3)9-7-16(14)19(2)8-6-13(21)11-17(12)19/h6,8,11,14-16H,1,4-5,7,9-10H2,2-3H3/t14-,15-,16-,19+,20-/m0/s1 checkY
  • Key:BFYIZQONLCFLEV-DAELLWKTSA-N checkY
 ☒NcheckY (what is this?)  (verify)

Exemestane, sold under the brand name Aromasin among others, is a medication used to treat breast cancer. It is a member of the class of antiestrogens known as aromatase inhibitors. Some breast cancers require estrogen to grow. Those cancers have estrogen receptors (ERs), and are called ER-positive. They may also be called estrogen-responsive, hormonally-responsive, or hormone-receptor-positive. Aromatase is an enzyme that synthesizes estrogen. Aromatase inhibitors block the synthesis of estrogen. This lowers the estrogen level, and slows the growth of cancers.

  1. ^ "Aromasin - Summary of Product Characteristics (SmPC)". (emc). 16 May 2022. Retrieved 29 November 2022.
  2. ^ "Exemestane". ChEBI.

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