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1-O-Methyl-2-O-[2-O,3-O-[(S)-benzylidene]-5-O-(2-O,3-O-carbonyl-4-O-acetyl-beta-L-rhamnopyranosyl)-D-apio-beta-D-furanosyl]-3-O,4-O-isopropylidene-alpha-D-galactopyranuronic acid methyl ester


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