2-amino-8-[(4-chlorophenyl)methylsulfanyl]-3,7-dihydropurin-6-one 2-amino-8-[(4-chlorophenyl)methylthio]-3,7-dihydropurin-6-one 2-amino-8-[(4-chlorobenzyl)thio]-3,7-dihydropurin-6-one Oprea1_049487