Benzo[2,1,3]thiadiazole-4-sulfonyl chloride2,1,3-Benzothiadiazole-4-sulphonyl chloride4-(Chlorosulphonyl)-2,1,3-benzothiadiazole2,1,3-benzothiadiazole-4-sulfonyl chloridebenzo[c][1,2,5]thiadiazole-4-sulfonyl chloride2,1,3-苯并噻二唑-4-磺酰氯2,1,3-Benzothiadiazole-4-sulfonyl chloride