C18H24O4
304.4 g/mol
APIDanger
Estetrol anhydrous
CAS15183-37-6
Category
API
Compound Class
Steroid
Primary Use
Pharmaceutical Raw Material
Estetrol anhydrous is a natural estrogen produced exclusively during pregnancy by the fetal liver. It functions as an estrogen receptor agonist and is used as a pharmaceutical raw material in contraceptive formulations.
pharmaceutical manufacturing raw materialestrogen receptor agonistcontraceptive ingredient
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Verapamil hydrochloride
CAS152-11-4
pharmaceutical raw material
ReferenceSame Category
Sulfalene
CAS152-47-6
pharmaceutical raw material
ReferenceSame Category
11-deoxycortisol
CAS152-58-9
pharmaceutical raw material
ReferenceSame Category
Dydrogesterone
CAS152-62-5
pharmaceutical raw material
Safety Reference
Danger
H351Suspected of causing cancer
H360May damage fertility or the unborn child
H361Suspected of damaging fertility or the unborn child
H362May cause harm to breast-fed children
H410Very toxic to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for Estetrol anhydrous (CAS 15183-37-6) is 2937.23.
HS code (international, 6-digit)
2937.23
EU CN code (8-digit)
2937 23 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(8R,9S,13S,14S,15R,16R,17R)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,15,16,17-tetrol
InChIKey
AJIPIJNNOJSSQC-NYLIRDPKSA-N
SMILES
C[C@]12CC[C@H]3[C@H]([C@@H]1[C@H]([C@H]([C@@H]2O)O)O)CCC4=C3C=CC(=C4)O
Synonyms (28)
- 4OH
- E4
- Estetrol (USAN)
- 15?-Hydroxyestriol
- 15alpha-hydroxyestriol
- Donesta
- ESTETROL (E4)
- Estetrol
- Estetrol anhydrous
- Estetrol, >=98% (HPLC)
- US9034854, E4
- estell
- estetrolum
- oestetrol
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