(+/-)-(10α)-Dimethyl 8,8-(ethylenedioxy)-2-methoxy-7-<(methoxymethyl)oxy>gibba-1,3,4a(10a),4b-tetraene-1,10-dicarboxylate

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

methyl 3,8-dimethoxy-1-oxo-4,10-dihydro-1H,3H-3,10a-methanoindeno[2,1-c]oxepine-9-carboxylate

Methyl 2-methoxy-7-oxo-4b,5,6,7-tetrahydrofluorene-1-carboxylate

7-Cyano-7-hydroxy-2-methoxy-6,7,8,9-tetrahydro-5H-fluorene-1-carboxylic acid methyl ester