ICI-85966

ICI-85966
Clinical data
Other names	Stilbostat; Diethylstilbestrol (DES) bis(di(2-chloroethyl)carbamate)
Identifiers
	IUPAC name [4-[(E)-4-[4-[Bis(2-chloroethyl)carbamoyloxy]phenyl]hex-3-en-3-yl]phenyl] N,N-bis(2-chloroethyl)carbamate;
CAS Number	15470-58-3 ;
PubChem CID	3037081;
ChemSpider	2300916;
UNII	VUD64CLJ7Z;
CompTox Dashboard (EPA)	DTXSID301046846 ;
Chemical and physical data
Formula	C28H34Cl4N2O4
Molar mass	604.39 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES CC/C(=C(/CC)\C1=CC=C(C=C1)OC(=O)N(CCCl)CCCl)/C2=CC=C(C=C2)OC(=O)N(CCCl)CCCl;
	InChI InChI=1S/C28H34Cl4N2O4/c1-3-25(21-5-9-23(10-6-21)37-27(35)33(17-13-29)18-14-30)26(4-2)22-7-11-24(12-8-22)38-28(36)34(19-15-31)20-16-32/h5-12H,3-4,13-20H2,1-2H3/b26-25+; Key:BOIZOYRDXIYMCY-OCEACIFDSA-N;

ICI-85966 (former tentative brand name Stilbostat), also known as diethylstilbestrol (DES) bis(di(2-chloroethyl)carbamate), is a synthetic, nonsteroidal estrogen and cytostatic antineoplastic agent of the stilbestrol group and a nitrogen mustard ester of diethylstilbestrol (DES) which was developed for the treatment of breast cancer and prostate cancer but was never marketed (possibly due to the toxicity of DES).