(3S,4aS,6aS,7aR,10aR,10bS,10cS)-9,9-Dimethyl-3,10b-divinyl-decahydro-5,7,8,10-tetraoxa-pentaleno[1,2-a]naphthalen-6-ol

(1S,2S,5S)-2-[(3aR,5S,6S,6aR)-5-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-6-vinyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl]-5-vinyl-cyclohexanol