A novel polysaccharide (LBLP5-A) was purified from Lycium barbarum leaves.
The structure of LBLP5-A was determined by several chemical methods combined with electrospray ionization–mass spectrometry (ESI–MS).
LBLP5-A exhibited a good scavenging ability on superoxide, hydroxyl, and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals.