Rhoiptelenol and rhoiptelenone, two pentacyclic triterpenes from Sideritis macrostachya.
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 13C NMR spectra of rhoiptelenol, rhoiptelenol acetate and glutinol have been reassigned. The natural occurrence of the D:B-friedo-ursene and D:B-friedo-oleanene derivatives has been examined.
Fraga
Braulio M
BM
Instituto de Productos Naturales y Agrobiología C. S. I. C., Avda. Astrofísico F. Sánchez 3, PO Box 195, 38206 La Laguna, Tenerife, Canary Islands, Spain. bmfraga@ipn.csic.es
Reina
Matías
M
Luis
Javier G
JG
Rodríguez
Matías L
ML
D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D031365:Sideritis / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
D014315:Triterpenes; C480304:rhoiptelenone; C480303:rhoiptelenol