英文别名1H-Pyrazole-4-carboxylic acid, 5-(chlorosulfonyl)-1-methyl-, ethyl ester; ethyl 5-chlorosulfonyl-1-methylpyrazole-4-carboxylate; 1-Methyl-4-ethoxy carbonyl pyrazole-5-sulfonyl chloride; 4-ethoxycarbonyl-1-methylpyrazole-5-sulfonylchloride; ethyl 1-methyl-5-chlorosulfonylpyrazole-4-carboxylate 
