There is a method of treating or preventing sarcoidosis-associated pulmonary hypertension in a patient. The method has the step of administering to the patient a therapeutically effective amount of one or more compounds: (S)-ethyl 8-(2-amino-6-((R)-1-(5-chloro-[1,1′；-biphenyl]-2-yl)-2,2,2-trifluoroethoxy)pyrimidin-4-yl)-2,8-diazaspiro[4.5]decane-3-carboxylate or a pharmaceutically acceptable salt thereof, or (S)-8-(2-amino-6-((R)-1-(5-chloro-[1,1′；-biphenyl]-2-yl)-2,2,2-trifluoroeth-oxy)pyrimidin-4-yl)-2,8-diazaspiro[4.5]decane-3-carboxylic acid or a pharmaceutically acceptable salt thereof, or a combination of the foregoing.
