Endothiapepsin In Complex With Ligand (3R,5R)-3-(2-((Methyl(Prop-2-Yn-1-Yl)Amino)Methyl)Thiazol-4-Yl)-5-(3-(2-Nitro-4-(Trifluoromethyl)Phenyl)-1,2,4-Oxadiazol-5-Yl)Pyrrolidin-3-Ol (Cbws-Se-171)