The Estramustine, with the CAS registry number 2998-57-4, is also known as Estra-1,3,5(10)-triene-3,17-diol(17b)-,3-[bis(2-chloroethyl)carbamate]. Its EINECS number is 221-076-3. This chemical's molecular formula is C₂₃H₃₁Cl₂NO₃ and molecular weight is 440.40. What's more, its systematic name is (17β)-17-Hydroxyestra-1,3,5(10)-trien-3-yl bis(2-chloroethyl)carbamate. Its classification codes are: (1)Alkylating Agents; (2)Antineoplastic; (3)Antineoplastic Agents; (4)Antineoplastic agents, alkylating; (5)Antineoplastic agents, hormonal; (6)Mutation data; (7)Noxae. It is a chemotherapy agent used to treat prostate cancer. It is indicated for the palliative treatment of metastatic and/or progressive carcinoma of the prostate.

Physical properties of Estramustine are: (1)ACD/LogP: 5.749; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 5.75; (4)ACD/LogD (pH 7.4): 5.75; (5)ACD/BCF (pH 5.5): 13782.64; (6)ACD/BCF (pH 7.4): 13782.64; (7)ACD/KOC (pH 5.5): 31953.75; (8)ACD/KOC (pH 7.4): 31953.75; (9)#H bond acceptors: 4; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 7; (12)Polar Surface Area: 49.77 Å²; (13)Index of Refraction: 1.576; (14)Molar Refractivity: 116.285 cm³; (15)Molar Volume: 351.379 cm³; (16)Polarizability: 46.099×10^-24cm³; (17)Surface Tension: 47.78 dyne/cm; (18)Density: 1.253 g/cm³; (19)Flash Point: 295.956 °C; (20)Enthalpy of Vaporization: 89.394 kJ/mol; (21)Boiling Point: 565.751 °C at 760 mmHg; (22)Vapour Pressure: 0 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES: ClCCN(C(=O)Oc1cc3c(cc1)[C@H]2CC[C@@]4([C@@H](O)CC[C@H]4[C@@H]2CC3)C)CCCl
(2)Std. InChI: InChI=1S/C23H31Cl2NO3/c1-23-9-8-18-17-5-3-16(29-22(28)26(12-10-24)13-11-25)14-15(17)2-4-19(18)20(23)6-7-21(23)27/h3,5,14,18-21,27H,2,4,6-13H2,1H3/t18-,19-,20+,21+,23+/m1/s1
(3)Std. InChIKey: FRPJXPJMRWBBIH-RBRWEJTLSA-N