4 amino 5 4 pyridyl 4h 1 2 4 triazole 3 thiol July 8, 2019 16 32 64 128 5-amino-4h-1 2 4-triazole-3-thiol 4-amino-1 2 4-triazole 5-amino-1 3 4-thiadiazole-2-thiol
