128643-92-5 MGGGR Methyl 3-O-glucopyranosyl-2-O-(6-O-(glucopyranosyluronic acid)glucopyranosyl)rhamnopyranoside Methyl O-beta-D-glucopyranosyl-(1-3)-O-(O-beta-D-glucopyranuronosyl-(1-6)-alpha-D-glucopyranosyl-(1-2))-6-deoxy-alpha-L-mannopyranoside alpha-L-Mannopyranoside, methyl O-beta-D-glucopyranosyl-(1-3)-O-(O-beta-D-glucopyranuronosyl-(1-6)-alpha-D-glucopyranosyl-(1-2))-6-deoxy-