The present invention relates to a medical use of a compound of chemical formula 1 for the treatment, alleviation, or prevention of nonalcoholic steatohepatitis (NASS) and/or liver fibrosis. The present invention provides a pharmaceutical composition which contains the compound of chemical formula 1 as an active component, and is useful for alleviating, treating or preventing NASS or liver fibrosis.본 발명은 비알콜성 지방간염(nonalcoholic steatohepatitis, NASH) 및/또는 간 섬유화의 치료, 개선, 또는 예방을 위한 화학식 1 화합물의 의학적 용도에 관한 것이다.