4-[2-(4-acetyl-2-nitrophenyl)ethoxy]-2-[(tert-butoxycarbonyl)amino]-4-oxobutanoic acid (non-preferred name) InChI=1/C19H24N2O9/c1-11(22)13-6-5-12(15(9-13)21(27)28)7-8-29-16(23)10-14(17(24)25)20-18(26)30-19(2,3)4/h5-6,9,14H,7-8,10H2,1-4H3,(H,20,26)(H,24,25 aspartic acid, N-[(1,1-dimethylethoxy)carbonyl]-, 4-[2-(4-acetyl-2-nitrophenyl)ethyl] ester