1) 3-methylbutanoyl chloride
2) 3-oxopentanoyl bromide
3) 2-methyl-3-oxocyclohexanecarbonyl iodide
4) 2,3-dihydroxypropanoyl chloride
5) 4-chlorocarbonyl-3-hydroxy-2-methylpentanoic acid
6) Benzoyl Chloride
7) 3-bromobutanoyl bromide
8) 4-oxobutanoyl iodide
9) Methanoyl Chloride