(3aR,4aS,5S,7aS,8S,9aR)-5-Hydroxy-4a-hydroxymethyl-8-methyl-decahydro-azuleno[6,5-b]furan-2-one

((3aS,5R,8S,8aS)-3a-Benzyloxymethyl-8-methyl-3-oxo-1,2,3,3a,4,5,8,8a-octahydro-azulen-5-yl)-acetic acid

tert-Butyl-((2aR,3S,3aR,6S,6aR,6bS,6cR)-6c-methoxy-3-methyl-2a,3,3a,4,5,6,6b,6c-octahydro-cyclopenta[a]cyclopropa[gh]pentalen-6-yloxy)-dimethyl-silane

(3aR,4aS,5S,7aS,8S,9aR)-4a-Benzyloxymethyl-5-hydroxy-8-methyl-decahydro-azuleno[6,5-b]furan-2-one

(3S,3aR,5S,8R,8aR)-3a-Benzyloxymethyl-3-(tert-butyl-dimethyl-silanyloxy)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-8-methyl-1,2,3,3a,4,5,8,8a-octahydro-azulene

(3R,3aS,6S,7R,8R,8aS,9R)-3-(tert-Butyl-dimethyl-silanyloxy)-8-methyl-2,3,6,7,8,8a-hexahydro-1H-3a,7-methano-azulene-6,9-diol

(3R,3aS,7S,8R,8aS,9R)-3-(tert-Butyl-dimethyl-silanyloxy)-9-hydroxy-8-methyl-octahydro-3a,7-methano-azulen-6-one