The present disclosure provides compositions for treatment or adjuvant treatment of liver cancer, comprising (S)-N-(4-(3-(1H-1,2,4-triazol-1-yl)-4-(3,4,5-trimethoxybenzoyl)phenyl)thiazol-2-yl)-2-amino-3-methylbutanamide or a pharmaceutically acceptable salt thereof. The compositions of the present disclosure exhibit an excellent effect of treating liver cancer.