(1-furan-3-yl-but-3-enyloxy)-acetic acid ethyl ester

(4aR,5R,8aR)-5-(2-((R)-6-(furan-3-yl)-5,6-dihydro-2H-pyran-3-yl)ethyl)-5,8a-dimethyl-6-methyleneoctahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolane]

(4aR,5R,8aR)-5-(4-(((R)-1-(furan-3-yl)but-3-en-1-yl)oxy)-3-oxobutyl)-5,8a-dimethylhexahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-6(5H)-one

(4aR,5R,8aR)-5-(3-((((R)-1-(furan-3-yl)but-3-en-1-yl)oxy)methyl)but-3-en-1-yl)-5,8a-dimethyl-6-methyleneoctahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolane]