5-(9-fluorenylmethyl) 2-methyl (2S,3aS,4S,5aR,10bS)-4-(tert-butoxycarbonylmethyl)-1,2,3,3a,4,5,5a,6-octahydropyrrolo[3',2':3,4]pyrrolo[2,3-b]indole-2,5-dicarboxylate

methyl (1S,3S,1'S)-1-[2'-(tert-butoxycarbonyl)-1'-(9-fluorenylmethoxycarbonyl)aminoethyl]-1,2,3,4-tetrahydro-β-carboline-3-carboxylate

5-(9-fluorenylmethyl) 2-methyl (2S,3aR,4S,5aS,10bR)-4-(tert-butoxycarbonylmethyl)-1,2,3,3a,4,5,5a,6-octahydropyrrolo[3',2':3,4]pyrrolo[2,3-b]indole-2,5-dicarboxylate