Composition for treating fibrotic diseases, comprising benzhydryl thioacetamide compound as active ingredient

A method for treating a fibrotic disease, the method comprising administering to a subject in need thereof an effective amount of a benzhydryl thioacetamide compound represented by Formula A, or a pharmaceutically acceptable salt thereof, whereby the administration suppresses the expression of a KCa2.3 channel protein in a cell membrane;

• wherein:
• X1˜X10 are each independently hydrogen (H) or fluorine (F), all of which are the same as or different from each other;
• Y is sulfur (S) or sulfoxide (S═O);
• * indicates a chiral position when Y is sulfoxide (S═O);
• and
• R1 is selected from hydrogen, a methyl group, an ethyl group, a methoxy group, an ethoxy group;
• a hydroxyl group, and a carbon compound having 3 to 6 carbon atoms.