Abstract
5-Hydroxy-7,4'-dimethoxy-6-methylflavone (II)
has been shown to occur with 5-hydroxy-7,4'-dimethoxy-6,8-dimethylflavone (I)
in the leaf waxes of Eucalyptus torelliana F. Muell. and E. urnigera Hook. The
nuclear magnetic resonance spectra of (II) and related compounds have been
measured, and it is shown that N.M.R. spectroscopy is useful in determining the
relative proportions of the two components at equilibrium in a Wessely-Moser
rearrangement. Leaf waxes from several Angophora species also contain compound
(I).
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