19-Norpregn-4-ene-3,20-dione,17-hydroxy-

The Gestonorone , its cas register number is 2137-18-0. The IUPAC name about this chemicals is (8R,9S,10R,13S,14S,17R)-17-acetyl-17-hydroxy-13-methyl-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one . Following are the physical and chemical properties about it: (1)Index of Refraction: 1.564 ; (2)Molar Refractivity: 87.86 cm³ ; (3)Molar Volume: 270.1 cm³ ; (4)Surface Tension: 47.4 dyne/cm ; (5)Enthalpy of Vaporization: 86.45 kJ/mol ; (6)Vapour Pressure: 1.95E-11 mmHg at 25°C .This chemicals belongs to the Steroids.

The Gestonorone is a white or almost white crystalline powder.It is progesterone medicines, a major role in the hypothalamus and pituitary by inhibiting pituitary gonadotropin secretion, so that follicle-stimulating hormone and luteinizing hormone levels lower or disappear, inhibiting ovulation; on the endometrium are also strong inhibition, affecting Yunluan implantation. Used for emergency contraception, the strong by suppressing follicular development, inhibit or delay ovulation, influence endometrial development, interfering with implantation of different sectors to achieve the purpose of avoiding pregnancy.

This chemicals can be described computed from structure: 
(1)Canonical SMILES: CC(=O)C1(CCC2C1(CCC3C2CCC4=CC(=O)CCC34)C)O
(2)Isomeric SMILES: CC(=O)[C@]1(CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CCC4=CC(=O)CC[C@H]34)C)O
(3)InChI: InChI=1S/C20H28O3/c1-12(21)20(23)10-8-18-17-5-3-13-11-14(22)4-6-15(13)16(17)7-9-19(18,20)2/h11,15-18,23H,3-10H2,1-2H3/t15-,16+,17+,18-,19-,20-/m0/s1
(4)InChIKey: GTFUITFQDGVJSK-XGXHKTLJSA-N