2764-56-9 2792-04-3 Hisfen Hisphen Histidine, N-((p-(bis(2-chloroethyl)amino)phenyl)acetyl)-, methyl ester, dihydrochloride, L- L-Histidine, N-((4-(bis(2-chloroethyl)amino)phenyl)acetyl)-, methyl ester, dihydrochloride MD 2 N-((4-(Bis(2-chloroethyl)amino)phenyl)acetyl)-L-histidine methyl ester p-Di(2-chlorethyl)aminophenacetyl histidine methyl ester