1H-v-Triazolo[4,5-d]pyrimidine-5,7(4H,6H)-dione, 5-thio- 2-Thio-6-hydroxy-8-azapurine 31571-52-5 3H-s-Triazolo[4,5-d]pyrimidin-7(4H,6H)-one, 5-thiono- 5-Thiono-s-triazolo[4,5-d]pyrimidin-7(4H,6H)-one 7H-1,2,3-Triazolo[4,5-d]pyrimidin-7-one, 1,4,5,6-tetrahydro-5-thioxo- 8-Azathioxanthine NSC75811