title: (1) H and (13) C NMR characterization of new cycloartane triterpenes from Mangifera indica.
abstract: From the stem bark of Mangifera indica, seven cycloartane-type secondary metabolites were isolated. Compound 1 has been isolated for the first time from M. indica, whereas compounds 2 (2a and 2b, as an epimeric mixture), 3, and 4 are new triterpenoid-type cycloartanes. Unambiguous (13) C and (1) H NMR assignments for these compounds and the known compounds mangiferonic acid (compound 5), isomangiferolic acid (compound 6), ambolic acid (compound 7), and friedelin (compound 8) are reported; the latter because full NMR data for these compounds are not available in the literature.
authors.affiliation: Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, D.F. 04510, Mexico.
authors.forename: Carolina
authors.initials: C
authors.lastname: Escobedo-Martínez
authors.forename: M
authors.initials: M
authors.lastname: Concepción Lozada
authors.forename: Simón
authors.initials: S
authors.lastname: Hernández-Ortega
authors.forename: María Luisa
authors.initials: ML
authors.lastname: Villarreal
authors.forename: Dino
authors.initials: D
authors.lastname: Gnecco
authors.forename: Raúl G
authors.initials: RG
authors.lastname: Enríquez
authors.forename: William
authors.initials: W
authors.lastname: Reynolds
mesh_terms: D002247:Carbon Isotopes; D009682:Magnetic Resonance Spectroscopy / Q000592:standards; D031022:Mangifera / Q000737:chemistry*; D015394:Molecular Structure; D024301:Plant Bark / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D011522:Protons; D012015:Reference Standards; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism
chemical_list: D002247:Carbon Isotopes; D011522:Protons; D014315:Triterpenes; C085352:cycloartane