InChI=1/C16H24N2O4/c1-11(2)14(17-15(19)22-16(3,4)5)10-12-6-8-13(9-7-12)18(20)21/h6-9,11,14H,10H2,1-5H3,(H,17,19 carbamic acid, [2-methyl-1-[(4-nitrophenyl)methyl]propyl]-, 1,1-dimethylethyl ester tert-butyl [2-methyl-1-(4-nitrobenzyl)propyl]carbamate