1,4-Dihydro-7-amino-5H-1,2,3-triazolo(4,5-d)pyrimidine-5-thione 5H-1,2,3-Triazolo(4,5-d)pyrimidine-5-thione, 1,4-dihydro-7-amino- 7-Amino-1H-v-triazolo(4,5-d)pyrimidine-5-thiol 87866-18-0