61278-38-4 D-Glucose, O-(N-acetyl-alpha-neuraminosyl)-(2-6)-O-(O-(N-acetyl-alpha-neuraminosyl)-(2-3)-beta-D-galactopyranosyl-(1-3))-O-2-(acetylamino)-2-deoxy-beta-D-glucopyranosyl-(1-3)-stereoisomer Disialyl-N-tetraose