英文别名3-Ethyl-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one; 4H-Indol-4-one,3-ethyl-1,5,6,7-tetrahydro-6-(hydroxymethyl)-2-methyl; 3-ethyl-2-methyl-6-hydroxymethyl-4,5,6,7-tetrahydroindol-4-one; 2-methyl-3-ethyl-9-hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine; 3-ethyl-9-hydroxy-2-methyl-pyrido[1,2-a]pyrimidin-4-one; 9-Hydroxy-2-methyl-3-ethyl-4H-pyrido<1,2-a>pyrimidin-4-on; 3-ethyl-9-hydroxy-2-methyl-4H-pyrid[1,2-a]pyrimidin-4-one; 2-methyl-3-ethyl-6-hydroxymethyl-4,5,6,7-tetrahydroindole-4-one; 3-ethyl-9-hydroxy-2-methylpyrido[1,2-a]pyrimidin-4-one; Paliperidone Impurity 15; Paliperidone impurity 21; Paliperidone-5 
