2-Mercapto-6-hydroxypurine 2-Thioxanthine 2487-40-3 6-Hydroxy-2-mercaptopurine 6-Hydroxypurine-2-thiol 6H-Purin-6-one, 1,2,3,7-tetrahydro-2-thioxo- NSC36822 Xanthine, 2-thio-