A sulfonamide and pyrimidine derivative that acts as a dual endothelin receptor antagonist used to manage PULMONARY HYPERTENSION and SYSTEMIC SCLEROSIS.

Synonyms: Ro 470203, 4-t-Butyl-N-(6-(2-hydroxyethoxy)-5-(2-methoxyphenoxy)-2,2'-bipyrimidin-4-yl)benzenesulfonamide, Ro-47-0203, Ro 47-0203, Ro 47 0203, Q326023R30, Bosentan Anhydrous, 0, Bosentan Monohydrate, Tracleer, Bosentan, Benzenesulfonamide, 4-(1,1-dimethylethyl)-N-(6-(2-hydroxyethoxy)-5-(2-methoxyphenoxy)(2,2'-bipyrimidin)-4-yl)-, XUL93R30K2