Synonyms: Piperidinium, 4-[(2,3-dihydro-5,6-dimethoxy-1-oxo-1H-inden-2-yl)methyl]-1,1-bis(phenylmethyl)-, bromide (1:1), Piperidinium, 4-[(2,3-dihydro-5,6-dimethoxy-1-oxo-1H-inden-2-yl)methyl]-1,1-bis(phenylmethyl)-, bromide (9CI), 4-[(2,3-Dihydro-5,6-dimethoxy-1-oxo-1H-inden-2-yl)methyl]-1,1-bis(phenylmethyl)piperidinium bromide (1:1), 1,1-Dibenzyl-4-[(5,6-dimethoxy-1-oxo-2,3-dihydro-1H-inden-2-yl)methyl]piperidinium bromide, Donepezil quaternary salt, Donepezilbenzyl bromide