Phenolic Compounds from the Leaves of Eucalyptus microcorys F. Muell

A new acylated glycoside, 4-O-( 4',6'-di-O-galloyl- b - D -glucopyranosyl)-trans-p-coumaric acid, named microcoryn ( 1 ) , together with sixteen known phenolic compounds, 5-O-(6'-O-galloyl- b - D -glucopyranosyl)-gentisic acid (2), ellagic acid (3), gallic acid (4), kaempferol (5), quercetin (6), 3-O-galloyl- b - D -glucose (7), 2,3,6-tri-O-galloyl- b - D -glucose (8), 1,2,4,6-tetra-O-galloyl- b - D -glucose (9), 1,2,3,4,6-penta-O-galloyl- b - D -glucose (10), 4,6-hexahydroxydiphenoyl- b - D -glucose (11), gemin D (12), tellimagrandin I (13), tellimagrandin II (14), isocoriariin F (15), oenothein C (16), and oenothein B (17) were isolated from the leaves of Eucalyptus microcorys . The structure of the new compound was elucidated by spectroscopic data, especially by 2D NMR techniques. This is the first phytochemical investigation of this plant's leaf extract.