6-(Pentylthio)purine ,its CAS NO. is 5443-89-0,the synonyms is 6-Amylmercaptopurine ; EINECS 226-638-1 ; NSC 19864 ; 1H-Purine, 6-(pentylthio)- (9CI) ; 6-(Pentylthio)-1H-purine ; Purine, 6-(pentylthio)- .