97162-56-6 CHSC Ceramide heptassaccharide Heptaglycosylceramide, Le(a)-active Paragloboside, O-6-deoxy-alpha-L-galactopyranosyl-(1-4)-O-(beta-D-galactopyranosyl-(1-3))-O-2-(acetylamino)-2-deoxy-beta-D-glucopyranosyl-(1-3D)-