英文别名3-(2-Chloroethyl)-2-methyl-7,8-dihydro-4H-pyrido[1,2-a]pyrimidine-4,9(6H)-dione; 3-(2-chloroethyl)-9-oxo-2-methyl-6,7,8,9-tetrahydro-4H-pyrido-[1,2-a]pyrimidin-4-one; Paliperidone Impurity 5; Paliperidone Impurity 28; 4H-Pyrido[1,2-a]pyrimidine-4,9(6H)-dione, 3-(2-chloroethyl)-7,8-dihydro-2-methyl-; Paliperidone Impurities5; 3-(2-Chloroethyl)-7,8-dihydro-2-methyl-4H-pyrido[1,2-α]pyrimidine-4,9(6H)-dione 
