title: Eremophilanes from Senecio mairetianus and some reaction products.
abstract: Eight new eremophilanolides (1, 2, 4-7, 9, and 10), a new eremophilane (13), and several known compounds were isolated from the roots and aerial parts of Senecio mairetianus. The chemical structures were proposed taking into consideration spectroscopic analyses and chemical transformations. X-ray diffraction analysis of 2, 4, and 9 confirmed their structures. The stereochemistry of 1,10-epoxy-8alpha-methoxyermophilanolide (3) was determined. Compounds 4-7, 9, and 10 are possible artifacts obtained by preparation of the alkaloidal extract.
authors.affiliation: Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacan 04510, D.F., México. alperezc@servidor.unam.mx
authors.forename: Ana-L
authors.initials: AL
authors.lastname: Pérez-Castorena
authors.forename: Amira
authors.initials: A
authors.lastname: Arciniegas
authors.forename: S Laura
authors.initials: SL
authors.lastname: Guzman
authors.forename: José Luis
authors.initials: JL
authors.lastname: Villaseñor
authors.forename: Alfonso
authors.initials: A
authors.lastname: Romo de Vivar
mesh_terms: D018360:Crystallography, X-Ray; D008800:Mexico; D008968:Molecular Conformation; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry* / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D000081223:Polycyclic Sesquiterpenes; D012674:Senecio / Q000737:chemistry*; D012717:Sesquiterpenes
chemical_list: D009281:Naphthalenes; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; C018286:eremophilane compounds