3-[2-[4-((E)-(4-Fluoro-2-hydroxybenzoyl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-Methyl-4H-pyrido[1,2-a]pyriMidin-4-one;3-[2-[4-(4-Fluoro-2-hydroxybenzoyl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-Methyl-4H-pyrido[1,2-a]pyriMidin-4-one;R 72111;Risperidone 2-Hydroxybenzoyl IMpurity;Risperidone Related CoMpound G;Risperidone Metabolite;Risperidone USP Related Compound G;Risperidone Impurity Y