COMPOSITION FOR INCREASING EXPRESSION OF PGC-1α The present invention relates to a composition for 5 preventing or treating diseases or symptoms associated with a reduction in the expression of peroxisome proliferator- activated receptor coactivator 1-alpha (PGC-1α), the composition comprising, as an active ingredient, a compound represented by the following general formula I, a salt 10 thereof, or a solvate thereof. (FIG. 1a)