(2-ethoxycarbonylmethylene-3-methoxycarbonyl-3-methyl-6-phenyl-cyclohexyl)-acetic acid
(3-methoxycarbonyl-3-methyl-2-oxo-6-phenyl-cyclohexyl)-acetic acid methyl ester
(3-ethoxycarbonylmethylene-4-methoxycarbonyl-4-methyl-bicyclohexyl-2-yl)-acetic acid
3-ethoxycarbonylmethylene-2-carboxymethyl-4-methyl-bicyclohexyl-4-carboxylic acid