2-[(tert-butoxycarbonyl)amino]pent-4-enoate 4-pentenoato, 2-[[(1,1-dimethylethoxy)carbonyl]amino]-, ion(1-) InChI=1/C10H17NO4/c1-5-6-7(8(12)13)11-9(14)15-10(2,3)4/h5,7H,1,6H2,2-4H3,(H,11,14)(H,12,13)/p-