英文别名1-Acetyl-4-(2,4-difluorobenzoyl)piperidine; Risperidone Impurity 19; 1-[4-(2,4-difluorobenzoyl)-1-piperidinyl]-1-ethanone; 1-(4-(2,4-difluorobenzoyl)piperidin-1-yl)ethan-1-one; Paliperidone Acetyl Impurity; Ethanone, 1-[4-(2,4-difluorobenzoyl)-1-piperidinyl]- 
