rac-diethyl ((R,E)-3-((3aS,4R,6aR)-4-((4-methoxybenzyl)oxy)-5,5-dimethyltetrahydro-1H-spiro[pentalene-2,2'-[1,3]dioxolan]-6a(3H)-yl)but-1-en-1-yl)phosphonate

rac-diethyl ((3R)-1-hydroxy-3-((3aS,4R,6aR)-4-((4-methoxybenzyl)oxy)-5,5-dimethyltetrahydro-1H-spiro[pentalene-2,2'-[1,3]dioxolan]-6a(3H)-yl)butyl)phosphonate

(1R,3aR,5aS,6R,8aR)-6-(4-Methoxy-benzyloxy)-1,7,7-trimethyl-octahydro-cyclopenta[c]pentalen-4-one