The farinose exudate produced by Primula palinuri was found to consist of 12 flavones at least. Two of them are novel natural compounds, 2′-hydroxy-2-methoxychalcone and 8,2′,5′-trihydroxyflavone 5′-benzoate. The structure was determined by analysis of MS and 2D NMR spectral data and spectral comparison with the known compounds.
Valant-VetscheraKM and WollenweberE. (2006) Flavones and Flavonols. In: Flavonoids - Chemistry, Biochemistry and Applications (AndersenØ.M. and MarkhamK.R. Eds.), pp. 617–748.
4.
FreemanPW, MurphyST, NemorinJE. (1981) The Constituents of Australian Pimelea Species. II The Isolation of Unusual Flavones form P. simplex and P. decora. Australian Journal of Chemistry, 34, 1779–1784.
5.
HuckCW, HuberCG, LagojaIM, OnganiaKH, ScherzH, BonnGK, PoppM. (1999) Isolation and structure elucidation of 3′,4′,5′ trihydroxyflavone from the flowers of Primula veries. Planta Medica, 65, 491.
6.
TanakaT, IinumaM, MizunoM. (1986) Spectral Properties of 2′-Oxygenated flavones. Chemical & Pharmaceutical Bulletin, 34, 1667–1671
WollenweberE, MannK, IinumaM, TanakaT, MizunoM (1988) 2′,5′-Dihydroxyflavone and its 5′-Acetate-Novel Compounds from the Farinose Exudate of Primula. Zeitschrift für Naturforschung, 43c, 305–307.
9.
WollenweberE. (1994) Flavones and Flavonols. In: The Flavonoids - Advances in Research since 1986, 259–335 (HarborneJB, Ed), Chapman and Hall, London, pp 259–335.