2-Mercapto-6-aminopurine 2-Mercaptoadenine 2-Thioadenine 2H-Purine-2-thione, 6-amino-1,3-dihydro- 3647-48-1 6-Amino-2-mercaptopurine Isoguanine, thio- NSC52758 Purine-2-thiol, 6-amino-