Hydroxydonepezil
| Name of Impurity/Standard | Hydroxydonepezil |
| CAS No. | 197010-20-1 |
| Molecular Formula | C₂₄H₂₉NO₄ |
| Molecular Weight | 395.49 g/mol |
| Synonyms: 2,3-Dihydro-2-[hydroxy[1-(phenylmethyl)-4-piperidinyl]methyl]-5,6-dimethoxy-1H-inden-1-one; Donepezil Hydroxy Keto Impurity | |