2-[(tert-butoxycarbonyl)amino]-4-[2-(4-nitrophenyl)ethoxy]-4-oxobutanoic acid (non-preferred name) InChI=1/C17H22N2O8/c1-17(2,3)27-16(23)18-13(15(21)22)10-14(20)26-9-8-11-4-6-12(7-5-11)19(24)25/h4-7,13H,8-10H2,1-3H3,(H,18,23)(H,21,22 aspartic acid, N-[(1,1-dimethylethoxy)carbonyl]-, 4-[2-(4-nitrophenyl)ethyl] ester