- REVISED STRUCTURE OF A FLAVONOID FROM THE FERN NOTHOLAENA ASCHENBORNIANA
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The structure of a flavonoid from the fern Notholaena aschenborniana, previously described as 5,4',6'-trihydroxy-6,7,2',3'-tetramethoxyflavone, is revised to 5,2',4'-trihydroxy-3,7,8,5'-tetramethoxyflavone on the basis of current studies on 2'-oxygenated flavonoids.Identity of the natural product with the proposed structure is confirmed by synthesis. Key Word Index - Notholaena aschenborniana; Pteridophyta; Polypodiaceae; 5,2',4'-trihydroxy-3,7,8,5'-tetramethoxyflavone; synthesis.
- Iinuma, M.,Fang, N.,Tanaka, T.,Mizuno, M.,Mabry, T. J.,et al.
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p. 1257 - 1258
(2007/10/02)
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