2-Hydroxyflavanones from Leptospermum polygalifolium subsp. polygalifolium Equilibrating sets of hemiacetal isomers.
2,5-Dihydroxy-6-methyl-7-methoxyflavanone and its isomer 2,5-dihydroxy-8-methyl-7-methoxyflavanone have been identified as the principal components in the ethanol extract of L. polygalifolium subsp. polygalifolium. The former compound has been separated from the latter for the first time by crystallisation. Other flavonoids identified include an equilibrating mixture of novel 2,3,5-trihydroxyflavanones; the first discovery of this type of compound from a natural source. This study has also confirmed the presence of the triketones, flavesone and leptospermone, along with the closely related isoleptospermone as anti-microbial components.
Mustafa
Kamarul'Ain
K
Department of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand.
Perry
Nigel B
NB
Weavers
Rex T
RT
D000080:Acetals / Q000737:chemistry*; D005591:Chemical Fractionation / Q000379:methods; D044950:Flavanones / Q000737:chemistry* / Q000302:isolation & purification*; D007536:Isomerism; D007700:Kinetics; D031649:Leptospermum / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods; D010936:Plant Extracts / Q000737:chemistry
D000080:Acetals; D044950:Flavanones; D010936:Plant Extracts