Ambrisentan API

(αS)-α-[(4,6-Dimethyl-2-pyrimidinyl)oxy]-β-methoxy-β-phenylbenzenepropanoic Acid; 
(2S)-2-(4,6-Dimethylpyrimidin-2-yl)oxy-3-methoxy-3,3-diphenylpropanoic acid; (S)-2-((4,6-dimethylpyrimidin-2-yl)oxy)-3-methoxy-3,3-diphenylpropanoic acid; Volibris; Letairis; (aS)-a-[(4,6-Dimethyl-2-pyrimidinyl)oxy]-B-methoxy-B-phenylbenzenepropanoic Acid