4.

Phenolic Compounds from the Leaves of Eucalyptus microcorys F. Muell.

Gilmara A. C. Fortes, Antônio J. R. da Silva, Pedro H. Ferri and Suzana C. Santos

Instituto de Química, Universidade Federal de Goiás, 74001-970, Goiânia, GO, Brazil

Núcleo de Pesquisas de Produtos Naturais, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, 21941-590, Rio de Janeiro, RJ, Brazil

Abstract: 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.

Keywords: A cylated glycosides; ellagitannins; spectroscopic analyses . © 2015 ACG Publications. All rights reserved.