英文别名Macitentan impurity D; 5-(4-bromophenyl)-6-[2-(5-bromopyrimidin-2-yl)oxyethoxy]-N-(ethylsulfamoyl)pyrimidin-4-amine; Macitentan N-Despropyl-N-Ethyl Impurity; Sulfamide, N-[5-(4-bromophenyl)-6-[2-[(5-bromo-2-pyrimidinyl)oxy]ethoxy]-4-pyrimidinyl]-N'-ethyl-; Macitentan N-Despropyl-N-Ethyl Impurity/ Macitentan N-Ethyl Analog; Macitentan Impurity 04