tert-butyl (2R)-2-[(1R,4R,6S)-1-(benzo[1,3]dioxol-5-yl)-6-benzyloxy-4-methoxy-2-cyclohexen-1-yl]-2-hydroxyethylcarbamate

tert-butyl (2R)-2-[(1R,4R,6S)-1-(benzo[1,3]dioxol-5-yl)-4-methoxy-6-hydroxy-2-cyclohexen-1-yl]-2-hydroxyethylcarbamate

tert-butyl (2R,3aR,4S,6S,7aS)-3a-(benzo[1,3]dioxol-5-yl)-2,4-dihydroxy-6-methoxyoctahydroindole-1-carboxylate

tert-butyl (2R,3aR,4S,6S,7aS)-3a-(benzo[1,3]dioxol-5-yl)-4-hydroxy-6-methoxy-2-triethylsilyloxy-octahydroindole-1-carboxylate

tert-butyl (3R,3aS,4S,6S,7aS)-3a-(benzo[d][1,3]dioxol-5-yl)-6-methoxy-4-(((methylthio)carbonothioyl)oxy)-3-((triethylsilyl)oxy)octahydro-1H-indole-1-carboxylate