diethyl 2-[acetyl(hex-5-enyl)amino]-2-prop-1-enylpropanedioate

prop-2-enyl 3-methylsulfanylpropanoate

tert-butyl 2-benzamidopent-4-enoate

2-methyl-3-prop-2-enylquinazolin-4-one

prop-2-enyl 5-(hydroxymethyl)-1,2-oxazole-3-carboxylate