Risperidone impurity 5/Risperidone EP Impurity F/Risperidone Carboxylate Impurity/2-[2-Methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a] pyrimidin-3-yl] ethyl 4-(6-fluoro-1,2-benzisoxazol-3-yl)piperidin-1-carboxylate

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