4-O-Acetyl-HD3 4-O-Acetyl-N-glycolylneuraminyl lactosylceramide 73379-75-6 Ceramide, 1-O-(O-4-O-acetyl-N-(hydroxyacetyl)-alpha-neuraminosyl-(2-3)-O-beta-D-galactopyranosyl-(1-4)-beta-D-glucopyranosyl)- GM3(Neu4AcGc)