A2G1F1(α-1-3) glycan (A2G1F1(a1-3) glycan) is an asymmetric Lewis X polysaccharide and N-glycan. SLeX is a ligand for the cell adhesion molecule E-selectin, which is specifically expressed at sites of inflammatory lesions. Designing SLeX-polysaccharide conjugates to deliver drugs to inflammatory lesions.