2-[(1-Benzylpiperidin-4-yl)hydroxyMethyl]-5,6-diMethoxyindan-1-one Donepezil Impurity 2 DONEPEZIL IMP Donepezil Impurity Donepezil Impurity 7 1-Benzyl-4-(5,6-dimethoxy-1-oxoindan-2-yl)methylpyridinium Bromide Methisosildenafil impure Acotiamide Impurity Terazosin EP Impurity O Methisosildenafil Impurity 7,8-Dihydro-14-hydroxy- normorphinone Methyl 2-(2-hydroxy-4,5-diMethoxybenzaMido)thiazole-4-carboxylate 3,5-Dimethyl-piperazine-1-carboxylic acid tert-butyl ester Donepezil Donepezil Impurity Dihydro Donepezil (Mixture of Diastereomers) 2-[(E)-(1-BENZYL-4-PIPERIDINYL)METHYLIDENE]-5,6-DIMETHOXY-1-INDANONE XWAIAVWHZJNZQQ-RPXFAUAJSA-N