6,7-dihydro-6-mercapto-5H-pyrazolo[1,2-a][1,2,4]triazolium chloride or 6,7-dihydro-6-mercapto-5H-pyrazolo[1,2-a][1,2,4]triazol-4-ium,chloride
≥98%(HPLC, 外标法)