1,3,4-Thiadiazole-2,5-dithiol1,3,4-Thiadiazole-2,5-dithiol2,5-二硫基-1,3,4-噻二唑Bismuthiol IBismuththiol I2,5-二巯基噻二唑铋试剂 I2,5-Dimercapto-1,3,4-thiadiazoleBismuthiol I铋试剂 I1,3,4-Thiadiazole-2,5-dithiol2,5-二硫基-1,3,4-噻二唑2,5-Dimercapto-1,3,4-thiadiazole2,5-二巯基-1,3,4-噻二唑