a type of organic compound with a five-membered ring containing both a carbon-carbon double bond and a ketone functional group
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1-<(4-Methoxycarbonyl)phenyl>-1,6-dioxo-dodeca-2,4-(E,E)-diene
(Z)-2-methyl-3-phenyl-4-(1-phenylpropylidene)cyclopent-2-enone
2-(5-methylfuran-2-yl)-1-phenylethan-1-one
Phosphonium, [3-(1-methyl-2,5-dioxocyclopentyl)-2-oxopropyl]triphenyl-, bromide