Parecoxib Impurity 18

Parecoxib Impurity D Parecoxib Sodium Imp.E Valdecoxib IMpurity D 5-Methyl-3,4-diphenylisoxazole Parecoxib Sodium Impurity H

tert-Butyl 4-(4-nitropyridin-3-yl)piperazine-1-carboxylate 5-Difluoromethoxy-2-{[(3,4-dimethoxy-2-pyridinyl)methyl]thio}-1H-benzimidazole Parecoxib Impurity 3 4-(5-methyl-4-phenylisoxazol-3-yl)benzenesulfonamide PANTOPRAZOLE SULPHONE SODIUM SALT

5-(Difluoromethoxy)-2-mercapto-1H-benzimidazole Parecoxib Impurity H Parecoxib Impurity 16 Parecoxib Impurity 22 Parecoxib Impurity 17

Parecoxib Impurity 9 Parecoxib Impurity 13 Parecoxib Impurity 21