3-chloro-2-diethoxyphosphorylprop-1-ene

ethyl 2-benzoyl-4-(diethoxyphosphoryl)pent-4-enoate

diethyl (4-acetyl-5-oxo)hex-1-en-2-ylphosphonate

diethyl α-(2,6-dioxocyclohexylmethyl)vinylphosphonate

ethyl 4-(diethoxyphosphoryl)-2-nitropent-4-enoate