p. 1525 - 1528
(1996)methyl 3,5-dimethoxy-1-methylcyclohexa-2,5-diene-1-carboxylate
3,5-dioxo-1-methylcyclohexane carboxylic acid methyl ester
(S)-2-{1-[4-((S)-1-Methoxycarbonyl-2-phenyl-ethylcarbamoyl)-4-methyl-2,6-dioxo-cyclohexylidene]-ethylamino}-3-phenyl-propionic acid methyl ester
4-acetyl-3,5-dioxo-1-methylcyclohexane carboxylic acid
4-acetyl-3,5-dioxo-1-methylcyclohexane carboxylic acid methyl ester