473465-11-1

Parecoxib Sodium-24 Parecoxib Impurity 69 Parecoxib Impurity 42 Valdecoxib Impurity 16 Parecoxib Sodium Impurity 27 Parecoxib Sodium Impurity 58 Parecoxib Impurity R: Ethylamine Impurity ethyl 4-(5-methyl-3-phenylisoxazol-4-yl)benzenesulfonate N-ethyl-4-(5-methyl-3-phenylisoxazol-4-yl)benzenesulfonamide Benzenesulfonamide, N-ethyl-4-(5-methyl-3-phenyl-4-isoxazolyl)- Parecoxib impurity 30/N-ethyl-4-(5-methyl-3-phenylisoxazol-4-yl)benzenesulfonamide