159899-37-3 17-O-((2-(3-(4-Azido-3-iodophenyl)propionamido)ethyl)carbamyl)estradiol-3-N-bis(chloroethyl)carbamate Aipp-EM Estra-1,3,5(10)-triene-3,17-diol (17beta)-, 17-((2-((3-(4-azido-3-(iodo-125I)phenyl)-1-oxopropyl)amino)ethyl)carbamate) 3-(bis(2-chloroethyl)caramate)