THR-β agonist 3 is a potent agonist of THR-β. THR-β agonist 3 has the potential for the research of metabolic diseases such as obesity, hyperlipidemia, hypercholesterolemia, diabetes and other conditions such as steatosis and non-alcoholic steatohepatitis (NASH), atherosclerosis and other related conditions and diseases (extracted from patent WO2021129827A1, compound 6).