1MAR:
reference: Refined 1.8 A structure of human aldose reductase complexed with the potent inhibitor zopolrestat., Wilson DK, Tarle I, Petrash JM, Quiocho FA, Proc Natl Acad Sci U S A 1993 Nov 1;90(21):9847-51. PMID: 8234324

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