3-(furan-2-yl)-5-oxocyclohexane-1,2-dicarboxylic acid

4-(furan-2-yl)-3,4,4a,9a-tetrahydro-1H-anthracene-2,9,10-trione

1-(2-furyl)-3-trimethylsiloxy-5,10-dioxo-1,4,4a,5,10,10a-hexahydroanthracene

4-(furan-2-yl)-3,4,4a,12a-tetrahydro-1H-tetracene-2,5,6,11,12-pentone