HMS561C15, 4-methoxycarbonyldimedone, methyl 2,2-dimethyl-4,6-dioxocyclohexane-3-carboxylate, methyl 2,2-dimethyl-4,6-dioxocyclohexanecarboxylate, methyl 2,2-dimethyl-4,6-dioxocyclohexa-1-carboxylate, 2,2-Dimethyl-4,6-dioxo-cyclohexancarbonsaeure-methylester, 2,2-dimethyl-4,6-dioxo-cyclohexanecarboxylic acid methyl ester