1,1'-dibenzyl-[3,3'-biindoline]-2,2'-dione

(3R,3a'S,6'R,7a'S)-1,1''-dibenzyl-2',2'-dimethyl-3a',4',7',7a'-tetrahydrodispiro[indoline-3,5'-benzo[d][1,3]dioxole-6',3''-indoline]-2,2''-dione

(5aR,6aS,11bR,15aS)-5,7-dibenzyl-5,5a,6a,7,12,15-hexahydrobenzo[3,4]furo[2,3-b:5,4-b']diindole

(3aS,8aR,3'aR,8'aS)-8,8'-Dibenzyl-2,3,8,8a,2',3',8',8'a-octahydro-1H,1'H-[3a,3'a]bi[pyrrolo[2,3-b]indolyl]

(3aS,8aR,3'aR,8'aS)-8,8'-Dibenzyl-1,1'-dimethyl-2,3,8,8a,2',3',8',8'a-octahydro-1H,1'H-[3a,3'a]bi[pyrrolo[2,3-b]indolyl]