| anti-tmv activity flavones from the leaves of yunnan local air cured tobacco. | four new flavones, tobaflavones e-h (1-4), together with two known flavones (5 and 6), were isolated from the leaves of dali tiandeng tobacco (a variety of yunnan local air cured tobacco). their structures were elucidated by spectroscopic methods, including extensive 1d- and 2d nmr techniques. compound 2 is the first naturally occurring flavone bearing a (4-hydroxy-6-methyl-2-oxo-2h-pyran-3-yl)methyl moiety. these compounds were also evaluated for their anti-tobacco mosaic virus (anti-tmv) activ ... | 2015 | 25937499 |