3-{[(9H-fluoren-9-ylmethoxy)carbonyl]amino}-3-pyrimidin-5-ylpropanoic acid 5-pyrimidinepropanoic acid, beta-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]- InChI=1/C22H19N3O4/c26-21(27)9-20(14-10-23-13-24-11-14)25-22(28)29-12-19-17-7-3-1-5-15(17)16-6-2-4-8-18(16)19/h1-8,10-11,13,19-20H,9,12H2,(H,25,28)(H,26,27