LS-tetrasaccharide a sodium salt;LST A;LS-TETRASACCHARIDE A;SIALYLLACTO-N-TETRAOSE A;LST a, N-Acetylneuramin-lacto-N-tetraosea, α-NeuNAc-(2-3)-β-Gal-(1-3)-b-GlcNAc-(1-3]-β-Gal-(1-4)-Glc;α-NeuNAc-(2→3)-β-Gal-(1→3)-b-GlcNAc-(1→3]-β-Gal-(1→4)-Glc;LS-tetrasaccharide a sodium;D-Glucose, O-(N-acetyl-α-neuraminosyl)-(2→3)-O-β-D-galactopyranosyl-(1→3)-O-2-(acetylamino)-2-deoxy-β-D-glucopyranosyl-(1→3)-O-β-D-galactopyranosyl-(1→4)-