(2S)-2-(4,6-dimethylpyrimidin-2-yl)oxy-3-methoxy-3,3-di(phenyl)propanoic acid (2S)-2-[(4,6-dimethyl-2-pyrimidinyl)oxy]-3-methoxy-3,3-di(phenyl)propanoic acid (2S)-2-(4,6-dimethylpyrimidin-2-yl)oxy-3-methoxy-3,3-di(phenyl)propionic acid Letairis Volibris