(5-acetamido-3,5-dideoxy-D-glycero-D-galacto-2-nonulopyranosylonic acid)-2-3-galactopyranosyl-(1-3)-2-acetamido-2-deoxygalactopyranosyl-1-3-galactopyranosyl-1-3-galactopyranosyl-1-4-glucopyranosyl-(1-1)-2-octadecanamido-4-octadecene-1,3-diol