1,7,8,9-Tetrahydro-8-thioxo-6H-purin-6-one 6-Hydroxy-8-mercaptopurine 6305-94-8 6H-Purin-6-one, 1,7,8,9-tetrahydro-8-thioxo- (9CI) 8-Mercaptohypoxanthine 8-Thiohypoxanthine AI3-52143 EINECS 228-617-2 Hypoxanthine, 8-mercapto- (8CI) NSC 22713 SQ 21978