英文别名Risperidone Impurity B (Mixture of E/Z Isomers); Risperidone EP Impurity A and B (Mixture of E and Z Isomers); 4H-Pyrido[1,2-a]pyrimidin-4-one, 3-[2-[4-[(2,4-difluorophenyl)(hydroxyimino)methyl]-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-; 3-(2-(4-((2,4-Difluorophenyl)(hydroxyimino)methyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one 
