3-(3-hydroxycyclopenten-1-yl)benzonitrile

3-(3-溴苯基)-2-环戊酮

3-乙基环戊-2-烯-1-酮

3-prop-1-enylcyclopent-2-en-1-one

(4-methoxy-2-oxocyclopent-3-en-1-yl) acetate