Hyaluronic acid oligosaccharide fractions and drugs containing the same

The invention claims a is selected from 4 of ~60 sizes of HA the chitosan; Comprising the HA the chitosan, and a specific physical and chemical properties layer; andA comprises a pharmaceutical material. The HA the chitosan of the invention, and a cell death suppressing and cell to inhibitor, and cell and a protective agent (e.g organ. preservative and handled pyridine agent and for processing agent and IL-10 generating agent, or IL-8 inhibitor is) an active ingredient, the time for and), and has high), wherein the is arranged.