4-(2-benzyloxy-5-methoxycarbonylmethylphenyl)-4-phenylpiperidine-1-carboxylic acid tert-butyl ester
4-(2-hydroxy-5-methoxycarbonylmethylphenyl)-4-phenylpiperidine-1-carboxylic acid tert-butyl ester
[4-hydroxy-3-(4-phenylpiperidin-4-yl)phenyl]acetic acid methyl ester
3-{2-[4-hydroxy-3-(1-methyl-4-phenylpiperidin-4-yl)phenyl]ethoxy}propionic acid
3-{2-[4-benzyloxy-3-(1-methyl-4-phenylpiperidin-4-yl)phenyl]ethoxy}propionic acid