Methyl 2-(chloroacetoxy)-2-(diazoacetyl)-7-methoxy-1,2,3,4-tetrahydrofluorene-8-carboxylate

(+/-)-(10α)-8,8-(Ethylenedioxy)-2-methoxy-1-(methoxycarbonyl)-7-<(methoxymethyl)oxy>gibba-1,3,4a(10a),4b-tetraene-10-carboxylic acid

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

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

(+/-)-2-(Chloroacetoxy)-7-methoxy-8-(methoxycarbonyl)-1,2,3,4-tetrahydrofluorene-2-carboxylic acid