Tolterodine Propanoic Acid Impurity (R)-Isomer 

Chemical Name: (R)-3-(2-Hydroxy-5-methylphenyl)-3-phenylpropanoic acid ; (R)-3-(2-hydroxy-5-methylphenyl)-3-phenylpropanoic acid;

Synonym: (R)-Tolterodine Propionic Acid Impurity ;