title: Three new homoisoflavanones from the bulbs of Ledebouria floribunda.
abstract: Three new homoisoflavanones, namely ledebourin A (1), ledebourin B (2) and ledebourin C (3) were isolated from the bulbs of Ledebouria floribunda. Their structures were elucidated on the basis of detail spectroscopic analyses. This is the first report of this type of homoisoflavanones. Ledebourin B (2) and ledebourin C (3) exhibited potent antioxidant activity in the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging compared to the positive controls, the well-known antioxidant BHT and BHA.
authors.affiliation: Dipartamento Farmacia y Tecnología Farmacéutica (Facultad de Farmacia), University of Navarra, 31008, Pamplona, Spain. mcalvo@unav.es
authors.forename: María Isabel
authors.initials: MI
authors.lastname: Calvo
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001713:Biphenyl Compounds; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D019668:Liliaceae / Q000737:chemistry*; D015394:Molecular Structure; D010851:Picrates; D010936:Plant Extracts / Q000737:chemistry* / Q000494:pharmacology; D018517:Plant Roots
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D007529:Isoflavones; D010851:Picrates; D010936:Plant Extracts; C544784:ledebourin A; C544782:ledebourin B; C544783:ledebourin C; C004931:1,1-diphenyl-2-picrylhydrazyl