4891-15-0 Emcyt (free acid) Estra-1,3,5(10)-triene-3,17-diol (17.beta.)-, 3-[bis(2-chloroethyl)carbamate] 17-(dihydrogen phosphate) Estracyt Estradiol, 3-[bis(2-chloroethyl)carbamate] dihydrogen phosphate Estramustine phosphate Leo 299 NSC89199