4-(1-hydroxy-2-methylpropan-2-yl)-N-(6-(2-hydroxyethoxy)-5-(2-methoxyphenoxy)-[2,2'-bipyrimidin]-4-yl)benzenesulfonamide; 4-(2-Hydroxy-1,1-dimethylethyl)-N-[6-(2-hydroxyethoxy)-5-(2-methoxyphenoxy)[2,2'-bipyrimidin]-4-yl]-benzenesulfonamide; Ro 48-8634; Ro 48-5033; Bosentan Hydroxymethyl Impurity
