Sialyl Lewis X; 5-(acetylamino)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl-(2->3)-beta-D-galactopyranosyl-(1->4)-[6-deoxy-alpha-L-galactopyranosyl-(1->3)]-2-(acetylamino)-2-deoxy-D-glucose; 5-(acetylamino)-3,5-dideoxy-D-erythro-non-2-ulopyranonosyl-(2->3)hexopyranosyl-(1->4)-[6-deoxyhexopyranosyl-(1->3)]-2-(acetylamino)-2-deoxyhexopyranose