title: Gentiogenal, a conversion product of gentiopicrin (gentiopicroside)*.
abstract: The structure of gentiogenal, (+/-)5-formyl-6-methyl-3,4-dihydro-1H,6H-pyrano-[3,4-c-]-pyran-1-one, a conversion product of the aglucone of gentiopicrin (gentiopicroside), isolated from BLACKSTONIA PERFOLIATA (Gentianaceae), was elucidated by (1)H- and (13)C NMR spectroscopic, mass spectrometric and X-ray diffraction methods. In a TLC bioassay gentiogenal showed fungitoxicity towards PENICILLIUM EXPANSUM.
authors.affiliation: Farmaceutisch Laboratorium, sectie Farmacognosie Rijksuniversiteit Utrecht, The Netherlands.
authors.forename: W G
authors.initials: WG
authors.lastname: van der Sluis
authors.forename: J M
authors.initials: JM
authors.lastname: van der Nat
authors.forename: A L
authors.initials: AL
authors.lastname: Spek
authors.forename: Y
authors.initials: Y
authors.lastname: Ikeshiro
authors.forename: R P
authors.initials: RP
authors.lastname: Labadie