Macitentan Catalogue M102650 CAS 441798-33-0 M.W C19H20Br2N6O4S M.F 588.27 Specifications FAQs N-[5-(4-Bromophenyl)-6-[2-[(5-bromo-2-pyrimidinyl)oxy]ethoxy]-4-pyrimidinyl]-N�-propyl-sulfamide