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A novel pentacyclic triterpene from Leontodon filii

2005; Elsevier BV; Volume: 76; Issue: 2 Linguagem: Inglês

10.1016/j.fitote.2004.11.003

1873-6971

Zélia Tostão, João Paulo Noronha, Eurico J. Cabrita, Jorge Medeiros, Jorge Justino, Jaime Bermejo, Amélia P. Rauter,

Essential Oils and Antimicrobial Activity

A novel oleanene triterpenetetrol was isolated from the chloroform extract of the aerial parts of Leontodon filii.Its structure was shown to be 2h,3h,15a,21h-olean-12-ene-2,3,15,21-tetrol by chemical and spectroscopic methods.The fungicidal efficacy of the chloroform and methanol extracts of the plant was also evaluated, a protective effect being found against Plasmopara viticola, Botrytis cinerea, particularly powerful against Pyricularia oryzae.