Chemical Name: Ethyl ((R)-4-((3R,5R,8R,9S,10S,12S,13R,14S,17R)-3,12-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoyl)glycinate
Synonym: 4-((5,6-Diphenylpyrazine-2-yl)amino)butan-1-ol ; Selexipag DPB Desisopropyl Impurity