(+/-)-(1α,2α,4bβ,10α)-8,8-(Ethylenedioxy)-2-hydroxy-1-(methoxycarbonyl)-7-<(methoxymethyl)oxy>-1-methylgibb-4a(10a)-ene-10-carboxylic acid

(+/-)-(4bβ,10α)-Benzyl (8,8-ethylenedioxy)-2-methoxy-1-(methoxycarbonyl)-7-<(methoxymethyl)oxy>gibba-1,3,4a(10a)-triene-10-carboxylate

methyl 2'-methoxy-7'-(methoxymethoxy)-6',10'-dihydro-7'H,9'H-spiro[[1,3]dioxolane-2,8'-[7,9a]methanobenzo[a]azulene]-1'-carboxylate

(+/-)-(1α,4bβ,10α)-8,8-(Ethylenedioxy)-1-(methoxycarbonyl)-7-<(methoxymethyl)oxy>-1-methyl-2-oxogibb-4a(10a)-ene-10-carboxylic acid

(+/-)-(1α,2α,4bβ,10α)-Ethyl 2-(benzoyloxy)-8,8-(ethylenedioxy)-1-(methoxycarbonyl)-7-<(methoxymethyl)oxy>-1-methylgibb-4a(10a)-ene-10-carboxylate