(3aR,3bR,8aR,9aR)-2,2,3b-Trimethyl-hexahydro-1,3,4,9-tetraoxa-cyclopenta[a]azulen-6-one

1-[(3aR,5R,6R,6aR)-5-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-2,2,6-trimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yloxy]-but-3-en-2-ol

(R)-1-[(3aR,5R,6R,6aR)-6-(2-Benzyloxy-but-3-enyloxy)-2,2,6-trimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl]-ethane-1,2-diol