The Fenestrel ,its cas register number is 7698-97-7. The IPUAC name about this chemicals is 5-Ethyl-6-methyl-4-phenylcyclohex-3-ene-1-carboxylic acid .It has a related number is 16550-39-3 (hydrochloride salt). The index of refraction about it is 1.532, molar refractivity is 71.85 cm³ , molar volume is  231.7 cm³  and surface tension is 37.8 dyne/cm. also, it have other chemical properties, for example, the enthalpy of vaporization about this chemicals is 67.33 kJ/mol, vapour pressure is 9.44E-07 mmHg at 25°C and so on. Following are classification code about this chemicals: Estrogen ,Reproductive Effect and Tumor data.

The Fenestrel is a kind of estrogen and progesterone medicine.

This chemicals can be described computed from structure:
1) Canonical SMILES: CCC1C(C(CC=C1C2=CC=CC=C2)C(=O)O)C
2) InChI: InChI=1S/C16H20O2/c1-3-13-11(2)14(16(17)18)9-10-15(13)12-7-5-4-6-8-12/h4-8,10-11,13-14H,3,9H2,1-2H3,(H,17,18)
3) InChIKey: CLMFEXDZPBGYQQ-UHFFFAOYSA-N 

The most important thing about Fenestrel is the toxicity, following is the form: