| abstract |
The present invention provides pentosan polysulfate having a weight average molecular weight of 5000 or less and an acetyl group content of 0% to 2.0% by mass, or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof. The pentosan polysulfate of the present invention, or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof exhibits an anti-Xa activity and an anti-Xa / anti-Ila activity ratio, which are appropriate for practical use, and it is useful as a pharmaceutical composition such as an anticoagulant. |