7-chloro-2-methyl-1H-pyrazolo[5,1-b]quinazolin-9-one

乙酰乙酰邻硝基苯胺

3-methylidenenon-4-ynoic acid

2-phenylpropan-2-yl 3-oxobutanoate

N-ethyl-3-oxo-N-phenylbutanamide