title: A biphenanthrene and a phenanthro[4,3-b]furan from the orchid Bulbophyllum vaginatum.
abstract: Two minor metabolites of the whole plant of Bulbophyllum vaginatum collected in Singapore were identified as the biphenanthrene 1 and the phenanthro[4,3-b]furan derivative 2. Structure determinations were performed using a combination of 1D and 2D NMR techniques.
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Republic of Singapore.
authors.forename: Yuan-Wah
authors.initials: YW
authors.lastname: Leong
authors.forename: Leslie J
authors.initials: LJ
authors.lastname: Harrison
mesh_terms: D005663:Furans / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D029595:Orchidaceae / Q000737:chemistry*; D010616:Phenanthrenes / Q000737:chemistry* / Q000302:isolation & purification; D012846:Singapore
chemical_list: C493141:3-hydroxymethyl-9-methoxy-2-(4'-hydroxy-3',5'-dimethoxyphenyl)-2,3,6,7-tetrahydrophenanthro(4,3-b)furan-5,11-diol; C493140:4,4',6,6'-tetramethoxy-(1,1'-biphenanthrene)-2,2'3,3',7,7'-hexol; D005663:Furans; D010616:Phenanthrenes