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

Acetic acid (S)-2-[(3aR,8aS)-3a-(tert-butyl-dimethyl-silanyloxy)-2,3,3a,8a-tetrahydro-furo[2,3-b]indol-8-ylmethyl]-1-ethyl-3,4-dihydroxy-2-methyl-octyl ester