Method of treating inflammatory bowel disease comprising administering a pharmaceutical composition comprising a 6-aminopyridin-3-ol compound or a pharmaceutically acceptable salt thereof as an active ingredient to a subject

A method of treating inflammatory bowel disease, comprising:

• administering a pharmaceutical composition comprising a 6-aminopyridin-3-ol compound of Formula 1 below or a pharmaceutically acceptable salt thereof as an active ingredient to a subject:
• wherein
• R1 is a hydrogen, a C1 to C4 alkyl, or a phenyl, R2 is a hydrogen, a C1 to C16 alkyl, a C1 to C16 hydroxyalkyl, a C2 to C4 (5-hydroxy-trimethylpyridin-2-yloxy)alkyl, a C3 to C7 cycloalkyl, a benzyl, a phenyl, a C1 to C4 alkylphenyl, a nitrophenyl, a halophenyl, a benzo[d][1,3]-dioxol-5-yl, or a pyridine-2-yl;
• or R1 and R2 are linked to each other to form a 5-membered ring or a 6-membered ring, thereby forming a heterocyclic compound, and are any one selected from pyrrolidine-1-yl, 4-methylpiperazine-1-yl, 6-morpholino, and 1H-pyrrol-1-yl, and each of R3 to R5 is a methyl.