104789-46-0 6-(N-(2-Chloroethyl)carbamoyl)thio purine CCRIS 7602 Carbamothioic acid, (2-chloroethyl)-, S-1H-purin-6-yl ester Cloturin N-(2-Chloroethyl)thiocarbamic acid 6-purinyl ester S-1H-Purin-6-yl (2-chloroethyl)carbamothioate VUFB-15686