(3R,5aS,10bR,11aS)-3,6-dimethyl-10b-(2-methylbut-3-en-2-yl)-2,3,6,10b,11,11a-hexahydro-4H-pyrazino[1',2':1,5]pyrrolo[2,3-b]indole-1,4(5aH)-dione

1,8-di-tert-butyl 2-methyl (2S,3aR,8aR)-3a-(2-oxoethyl)-2,3,3a,8a-tetrahydropyrrolo[2,3-b]indole-1,2,8-tricarboxylate

dimethyl (-)-(2S,2'S,3aS,3'aS,8aS,8'aS)-1,1'-bis{(S)-2-[tert-butoxycarbonyl(methyl)amino]-3-phenylpropanoyl}-2,2',3,3',8,8a,8',8'a-octahydro-1H,1'H-3a,3'a-bipyrrolo[2,3-b]indole-2,2-dicarboxylate

(2S,3aR,8aR)-3a-bromo-1,8-bis(tert-butoxycarbonyl)-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indole-2-carboxylic acid

exo-allyl 3a-bromo-1,8-di-tert-butyloxycarbonyl-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indole-2-carboxylate