1EVE:
reference: Structure of acetylcholinesterase complexed with E2020 (Aricept): implications for the design of new anti-Alzheimer drugs., Kryger G, Silman I, Sussman JL, Structure Fold Des 1999 Mar 15;7(3):297-307. PMID: 10368299

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).