Synthesis of p-nitrophenyl 2-acetamido-2-deoxy-4-O-β-d-galactopyranosyl- β-d-glucopyranoside, and p-nitrophenyl 6-O-(2-acetamido-2-deoxy-3-O- and -4-O-β-d-galactopyranosyl- β-d-glucopyranosyl)-α-d-mannopyranoside

Abstract
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