2-重氮基环戊酮

2-(3-trimethylsilylprop-2-ynylidene)cyclopentan-1-one

1-chloro-2-oxocyclopentane-1-carbaldehyde

6,7-二氢-5H-环戊[d]嘧啶-2-胺

2-甲基环戊酮