(3aS,8aS)-5-methoxy-3a,8-dimethyl-3,3a,8,8a-tetrahydro-2H-furo[2,3-b]indole

(1S,4aS,9aR)-3-Hydroxy-6-methoxy-4a-methyl-1-vinyl-3,4,4a,9a-tetrahydro-1H-pyrano[3,4-b]indole-9-carboxylic acid benzyl ester

(3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester

(2R,3S)-2-((S)-1-Hydroxy-allyl)-5-methoxy-3-methyl-3-(2-methylamino-ethyl)-2,3-dihydro-indole-1-carboxylic acid benzyl ester

(S)-2-Acetoxy-3-[2-(tert-butoxycarbonyl-methyl-amino)-ethyl]-5-methoxy-3-methyl-2,3-dihydro-indole-1-carboxylic acid benzyl ester