SMILES: COC1=C(C=C2C(=C1)C[C@@H](C2=O)CC3CCN(CC3)CC4=CC=CC=C4)OC
Description: The molecule is a 2-[(1-benzylpiperidin-4-yl)methyl]-5,6-dimethoxyindan-1-one that has S configuration. It is a conjugate base of a (S)-donepezil(1+). It is an enantiomer of a (R)-donepezil.