1NPW:
reference: Design, synthesis, and biological evaluation of monopyrrolinone-based HIV-1 protease inhibitors., Smith AB 3rd, Cantin LD, Pasternak A, Guise-Zawacki L, Yao W, Charnley AK, Barbosa J, Sprengeler PA, Hirschmann R, Munshi S, Olsen DB, Schleif WA, Kuo LC, J Med Chem 2003 May 8;46(10):1831-44. PMID: 12723947

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