Dimethyl 2-hydroxy-7-methoxy-1,2,3,4-tetrahydrofluorene-2,8-dicarboxylate

2-Hydroxy-7-methoxy-8-(methoxycarbonyl)-1,2,3,4-tetrahydrofluorene-2-carboxylic acid

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

(+/-)-Methyl 7-(chloroacetoxy)-2-methoxy-8-oxogibba-1,3,4a(10a),4b-tetraene-1-carboxylate

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