7-(2-Diazo-acetyl)-7-(2,2-dichloro-acetoxy)-2-methoxy-6,7,8,9-tetrahydro-5H-fluorene-1-carboxylic acid methyl ester

(+/-)-(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

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