title: Triterpenoids, essential oil and photo-oxidative 28 --> 13-lactonization of oleanolic acid from Lantana camara.
abstract: Two novel triterpenoids have been isolated from the roots of Lantana camara L.: 3beta,19alpha dihydroxy ursan-28-oic acid and 21,22beta-epoxy-3beta-hydroxy olean-12-en-28-oic acid in its methyl ester form. Its leaves have yielded an essential oil which is rich in sesquiterpenes. Oleanolic acid, which is thought to be a hepatoprotective compound, was isolated from L. camara roots and converted into its 28 --> 13beta lactone by a facile photo-oxidation reaction.
authors.affiliation: Natural Products Chemistry Division, Central Institute of Medicinal and Aromatic Plants, Lucknow, India. lmiph@cup.uni-muenchen.de
authors.forename: L
authors.initials: L
authors.lastname: Misra
authors.forename: H
authors.initials: H
authors.lastname: Laatsch
mesh_terms: D007783:Lactones / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry*; D013058:Mass Spectrometry; D015394:Molecular Structure; D009822:Oils, Volatile / Q000737:chemistry*; D009828:Oleanolic Acid / Q000737:chemistry*; D010084:Oxidation-Reduction; D010777:Photochemistry; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D007783:Lactones; D009822:Oils, Volatile; D014315:Triterpenes; D009828:Oleanolic Acid