Intervention name : MD-0901 INN of the intervention : Mesalazine Dosage And administration of the intervention : Mesalazine 4.8 g/d are administrated orally once daily after breakfast for 8 weeks. Control intervention name : Asacol tablet INN of the control intervention : Mesalazine Dosage And administration of the control intervention : Mesalazine 3.6 g/d are administrated orally 3 times daily after each meal for 8 weeks. Intervention name : MD-0901 INN of the intervention : Mesalazine Dosage And administration of the inte ...