glucogallin 1-O-(3,4,5-Trihydroxybenzoyl)-β-D-glucopyranose 1-O-Galloyl β-D-glucopyranose 3,4,5-Trihydroxybenzoic acid β-D-glucopyranosyl ester Gallic acid β-D-glucopyranosyl ester β-D-Glucopyranose 1-(3,4,5-trihydroxybenzoate) 1-o-Galloylglucose beta-Glucogallin