Provided is a compound of Formula (I)(I) or a pharmaceutically acceptable salt thereof for use in treatment of non-alcoholic steatohepatitis, alcoholic hepatitis, pulmonary arterial hypertension, heart failure with preserved ejection fraction, and diabetic kidney disease. Also provided are amorphous and crystalline forms of the compound of Formula (I) and salts, co-crystals, solvates, and hydrates thereof.本發明提供一種式(I)化合物,(I); 或其醫藥上可接受之鹽,其用於治療非酒精性脂肪性肝炎、酒精性肝炎、肺動脈高血壓、射血分數保留型心臟衰竭及糖尿病性腎病。亦提供該式(I)化合物及其鹽、共晶體、溶劑合物及水合物之非晶形及結晶形式。