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Torasemi SM-Z3 Torasemide Impurity 18 Torsemide Impurity SM-Z3 4-Chloro-3-Chlorosulfonylpyridine 4-Chloro-3-pyridinsulfonylchlorid 4-Chloro-3-pyridinesulfonyl chlorid 4-Chloro-3-Pyridine-sulfonyl-chloride 3-Pyridinesulfonylchloride, 4-chloro- 4-hydroxy-3-pyridinesulfonyl chloride 4-chloro-1-pyridin-1-iumsulfonyl chloride 4-Chloro-3-pyridinesulfonylchlorideinToluene 4-Chloro-3-Pyridine-sulfonyl-chloride ISO 9001：2015 REACH