p. 1161 - 1164
(2007/10/03)5-isopropyl-2-oxo-[1,3]dioxole-4-carboxylic acid benzyl ester
2-diazo-4-methyl-3-oxo-pentanoic acid benzyl ester
2-hydroxy-4-methyl-3-oxo-pentanoic acid benzyl ester
ethyl 4-methyl-3-oxo-pentanoate
4-methyl-3-oxopentanoic acid benzyl ester