Enoxaparin sodium is a low molecular weight heparin sodium derived from heparin sodium and esterified by esterification. It consists of many complex and indeterminate oligosaccharides.

　　The weight average molecular weight of enoxaparin sodium is between 3800 and 5000, the mass percentage of oligosaccharides <2000 is between 12% and 20%, and the mass percentage of oligosaccharides <2000 and 8000 is between 68% and 82%.