3-甲氧基-2-环戊烯-1-酮

3-oxocyclopentene-1-carbonitrile

3-(methylamino)cyclopent-2-en-1-one

3-[methyl(3-methylbut-2-enyl)amino]cyclopent-2-en-1-one

3-methoxy-N-methylcyclopent-2-en-1-imine