p. 3721 - 3730
(2007/10/03)3,3-Dimethyl-1,5-dioxaspiro[5.5]undecane-9-carboxylic acid
9-[1-(4-methoxyphenyl)-4-hydroxy-piperidin-4-yl]-3,3-dimethyl-1,5-dioxaspiro[5.5]undecane-9-carboxylic acid
9-[1-(4-methoxyphenylpiperidin)-4-ylidene]-3,3-dimethyl-1,5-dioxaspiro[5.5]undecane