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Synthesis of methyl 4,6-di-O-galloyl-α-d-glucopyranoside (8) from 15.
Reagents and conditions: (a) 50% AcOH, 55 °C, 24 h; (b) BnG-Cl, in anhydrous pyridine, 60 °C, 48 h; (c) H2, 10% Pa-C, in THF containing approximately 13% of aqueous 95% EtOH, 40 °C, 10 atm, 12 h.
