Used in research settings to study drug metabolism, particularly as a metabolite of bosentan, helping scientists understand the metabolic pathways and clearance mechanisms of endothelin receptor antagonists. It aids in evaluating hepatic enzyme interactions and potential drug-drug interactions involving CYP450 enzymes. Due to its formation via acetylation, it also serves as a marker in pharmacokinetic studies assessing acetylator status in human populations. Not used therapeutically but supports preclinical analysis of drug safety and metabolic stability.