title: New eudesmane sesquiterpenes from Plectranthus cylindraceus.
abstract: Three new eudesmane sesquiterpenes, plectranthone (1), desacetylplectranthone (2), isodeacetylplectranthone (3), and the three known flavonols pachypodol, casticin, and chrysosplenol D were isolated for the first time from the aerial parts of Plectranthus cylindraceus. Their structures have been established on the basis of spectral data. The structures and relative stereochemistries of 1 and 2 were confirmed by single-crystal X-ray analysis.
authors.affiliation: Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia. kyorabi@ksu.edu.sa
authors.forename: K Y
authors.initials: KY
authors.lastname: Orabi
authors.forename: J S
authors.initials: JS
authors.lastname: Mossa
authors.forename: I
authors.initials: I
authors.lastname: Muhammed
authors.forename: M H
authors.initials: MH
authors.lastname: Alloush
authors.forename: A M
authors.initials: AM
authors.lastname: Galal
authors.forename: F S
authors.initials: FS
authors.lastname: El-Feraly
authors.forename: A T
authors.initials: AT
authors.lastname: McPhail
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D018360:Crystallography, X-Ray; D019686:Lamiaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D000890:Anti-Infective Agents; D012717:Sesquiterpenes