Phenylphenalenone type compounds from the leadf fibers of abaca (Musa textilis)

Abstract

1Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, P.O. Box 1052, E-41080, Seville, Spain 2Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain 3Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510 México D. F., MéxicoA series of phenylphenalenone–type compounds, known to play a role as phytoalexins in plants of the Musaceae family, have been identified for the first time in the leaf fibers of abaca (Musa textilis). Among the phenylphenalenone-type compounds identified, the structure of a novel compound, (1R) -2,3-dihydro-4,9-dihydroxy-8-methoxy-1-phenylphenalene, has also been described in abaca fibers. Its structure was elucidated by analysis of 1D- and 2D-NMR (COSY, HSQC, HMBC) spectroscopic data.Financial support from the project AGL2005-01748.Peer reviewe