(2R,3S)-3-[2-(tert-Butoxycarbonyl-methyl-amino)-ethyl]-2-((S)-1-hydroxy-allyl)-5-methoxy-3-methyl-2,3-dihydro-indole-1-carboxylic acid benzyl ester

(1S,5S,7R)-7-(tert-Butyl-dimethyl-silanyloxymethyl)-3-methyl-6,8-dioxa-bicyclo[3.2.1]octan-2-one

(1S,5S,7R)-7-(tert-Butyl-dimethyl-silanyloxymethyl)-6,8-dioxa-bicyclo[3.2.1]octan-2-one

(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

(2S,4R,5S,5aS,10bS)-4-(((tert-butyldimethylsilyl)oxy)methyl)-9-methoxy-10b-methyl-1,2,4,5,6,10b-hexahydro-5aH-2,5-epoxyoxepino[4,5-b]indol-5a-ol

benzyl (2R,4R,5R,5aR,10bS)-4-(((tert-butyldimethylsilyl)oxy)methyl)-9-methoxy-10b-methyl-1,2,4,5,5a,10b-hexahydro-6H-2,5-epoxyoxepino[4,5-b]indole-6-carboxylate