1-hydroxy-2-methyl-1-penten-3-one

(E/Z)-3-Phenyl-2-penten

2-hydroxymethylene-3-methyl-succinic acid diethyl ester

3-ethoxy-3-hydroperoxyprop-1-ene

5-Chloro-7-methoxy-3-(2-methylphenyl)-4-oxo-4H-1-benzopyran