1H-1,2,3-Triazolo(4,5-d)pyrimidin-7-amine, 5-(ethylthio)- 1H-v-Triazolo(4,5-d)pyrimidine, 7-amino-5-(ethylthio)- 7-Amino-5-(ethylthio)-1H-v-triazolo(4,5-d)pyrimidine 87866-21-5