Abstract Extraction of pollen of Nothofagus antarctica with acid hydrolysis yields kaempferol, quercetin, the rare flavonol sexangularetin, and naringenin. The tetrahydroxy-chalcone isosalipurpol is shown for the first time to occur in such high amount as free aglycone in mature pollen; it yields naringenin in usual extraction procedures. The bright yellow coloration of the pollen is due to the presence of isosalipurpol and sexangularetin.
Received: 1979-9-4
Published Online: 2014-6-2
Published in Print: 1979-12-1
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