24663-73-8 4-(Di(2-chloroethyl))proline ethyl ester dihydrochloride Aziprin L-Proline, 4-(bis(2-chloroethyl)amino)-, ethyl ester, dihydrochloride (9CI) Proline, 4-(bis(2-chloroethyl)amino)-, ethyl ester, dihydrochloride, L- Proline, 4-(di(2-chloroethyl))-, ethyl ester, dihydrochloride