Abstract
Two C-6 and C-8 methyl flavonols were isolated from a fungus and identified for the first time. The fungus Colletotrichum dematium f.sp. epilobii is a disease of fireweed, Epilobium angustifolium L. ssp. angustifolium (family Onagraceae); both disease and plant are indigenous to Canada. C. dematium secretes several metabolites when grown in liquid culture. Two novel natural product compounds: 5,4′-dihydroxy-3,7,8-trimethoxy-6-C-methylflavone and 5,4′-dihydroxy-3,6,7-trimethoxy-8-C-methylflavone were isolated from ethyl acetate extracts of liquid culture filtrates. Structures were confirmed on the basis of UV 1H NMR, 13C NMR spectroscopy, as well as mass spectroscopic techniques and represent the first report of C-methylflavonols produced by fungi. © 1997 Published by Elsevier Science Ltd. All rights reserved
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