3-甲氧基-2-环己烯-1-酮

6,7-二氢-4(5H)-苯并呋喃酮

5-hydroxy-5-(2-hydroxy-6-oxocyclohexen-1-yl)-1,3-diazinane-2,4,6-trione

3-hydroxy-2-(2-nitrophenyl)cyclohex-2-en-1-one

2-(2-nitrophenyl)-3-prop-2-enoxycyclohex-2-en-1-one