3-氯环戊烷-1,2-二酮

2-[2-(6-bromo-1,3-benzodioxol-5-yl)ethylamino]cyclopent-2-en-1-one

2-(6,7-dihydro-[1,3]dioxolo[4,5-f]indol-5-yl)cyclopent-2-en-1-one

2-异丙基-2-环戊酮

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