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Rhoiptelenol and Rhoiptelenone, Two Pentacyclic Triterpenes from Sideritis macrostachya

2003; De Gruyter; Volume: 58; Issue: 9-10 Linguagem: Inglês

10.1515/znc-2003-9-1002

1865-7125

Braulio M. Fraga, Matı́as Reina, Javier G. Luis, M.L. Rodríguez,

Plant biochemistry and biosynthesis

Abstract The pentacyclic triterpenes rhoiptelenol and rhoiptelenone have been isolated from Sideritis macrostachya. Rhoiptelenone is a new natural compound, whose structure has been determined as D:B-friedo-urs-5-en-3-one. The 1H and 13 C NMR spectra of rhoiptelenol, rhoiptelenol acetate and glutinol have been reassigned. The natural occurrence of the D:B-friedoursene and D:B-friedo-oleanene derivatives has been examined.