PROBLEM TO BE SOLVED: To provide pharmaceutical compositions effective for prophylaxis and/or treatment of inflammatory diseases of the gastrointestinal tract in a mammal, such as inflammatory bowel disease, ulcerative colitis, collagenous colitis, lymphocytic colitis, Crohn's disease, or irritable bowel syndrome.SOLUTION: The present invention provides a compound selected from brilacidin (PMX-30063) and delparantag (PMX-60056) represented by the formulas in the figure, and pharmaceutically acceptable salts thereof.SELECTED DRAWING: Figure 1【課題】哺乳類における消化管の炎症性疾患、例えば炎症性腸疾患、潰瘍性大腸炎、コラーゲン蓄積大腸炎、リンパ球性大腸炎、クローン病、又は過敏性腸症候群、の予防及び／又は治療に有効な医薬化合物の提供。【解決手段】以下の式で表わされるブリラシジン（ＰＭＸ－３００６３）及びデルパランタグ（ＰＭＸ－６００５６）から選択される化合物、並びにその薬学的に許容される塩。【選択図】図１
