42061-53-0 P,P-Bis(1-aziridinyl)-N-(2-chloro-7-methy l-7H-purin-6-yl)phosphinic acid P,P-Bis(1-aziridinyl)-N-(2-chloro-7-methyl-7H-purin-6-yl)phosphinic acid Phosphinic acid, P,P-bis(1-aziridinyl)-N-(2-chloro-7-methyl-7H-purin-6-yl)-