O-(3-deoxy-glycerogalacto-2-nonulopyranosylonic acid)-(2-3)-O-galactopyranosyl-(1-3)-O-(2-acetamido-2-deoxyglucopyranosyl)-(1-3)-O-galactopyranosyl-(1-4)-O-glucopyranosyl-(1-1)-2-octadecanamido-4-octadecene-1,3-diol