4-(N-(2-Chloroethyl)-N-methylamino)benzyl-gamma-amide dttp 69564-70-1 Cemabga-dttp Dttp gamma-4-(N-2-chloroethyl-N-methylamino)benzylamidate Thymidine 5'-(trihydrogen diphosphate) P'-anhydride with ((4-((2-chloroethyl)methylamino)phenyl)methyl)phosphoramidic acid