(R)-4-[(3aR,8aS)-3a-(tert-Butyl-dimethyl-silanyloxy)-2,3,3a,8a-tetrahydro-furo[2,3-b]indol-8-ylmethyl]-4-methyl-decane-3,5,6-triol

Acetic acid (E)-(S)-2-formyl-2-methyl-oct-3-enyl ester

Acetic acid (E)-(R)-2-[(3aR,8aS)-3a-(tert-butyl-dimethyl-silanyloxy)-2,3,3a,8a-tetrahydro-furo[2,3-b]indol-8-ylmethyl]-1-ethyl-2-methyl-oct-3-enyl ester

[(2S),3aR,8aS]-3a-(tert-butyldimethylsilyloxy)-8-(2-carboxypropyl)-3,3a,8,8a-tetrahydro-2H-furo[2,3-b]indole

[(2S),3aR,8aS]-3a-hydroxy-8-(2-methyl-3-trimethylacetoxypropyl)-3,3a,8,8a-tetrahydro-2H-furo[2,3-b]indole