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![N-[[4-(5-methyl-3-phenyl-4-isoxazolyl)phenyl]sulfonyl]isobutyramide (Parecoxib sodium impurity 5)](/upload/image/thumb/1_300_300_20250318202503181048.jpg)
N-[[4-(5-methyl-3-phenyl-4-isoxazolyl)phenyl]sulfonyl]isobutyramide (Parecoxib sodium impurity 5)
