SMILES: COC1=C(C=C2C(=C1)C[C@H](C2=O)CC3CC[NH+](CC3)CC4=CC=CC=C4)OC
Description: The molecule is a piperidinium ion resulting from the protonation of the amino group of (R)-donepezil. It is a conjugate acid of a (R)-donepezil. It is an enantiomer of a (S)-donepezil(1+).