6-ammonio-N-[(2R,4R,5R)-5-{[N-(tert-butoxycarbonyl)-L-phenylalanyl-3-(1H-imidazol-3-ium-4-yl)-L-alanyl]amino}-6-cyclohexyl-4-hydroxy-2-(2-methylpropyl)hexanoyl]-L-norleucylphenylalanine

P11838 — Endothiapepsin