Not Less Than - 95%
1,2-Bis({6-[4-(tert-Butyl)phenylsulfonamido]-5-(2-methoxyphenoxy)-[2,2'-bipyrimidin]-4-yl}oxy)ethane; N,N'-[1,2-Ethanediylbis[oxy[5-(2-methoxyphenoxy)[2,2’-bipyrimidine]-6,4-diyl]]]bis[4-(1,1-dimethylethyl)-benzenesulfonamide; Bosentan Dimer Impurity