| abstract |
The invention discloses a parallel seven-membered ring biphenyl compound (I), its preparation method and application. The whole plant of tobacco is used as raw material, extracted with high-concentration methanol or high-concentration acetone/water or high-concentration ethanol/water, the extracts are combined, filtered, and concentrated under reduced pressure to form an extract; the extract is packed in a silica gel dry column for silica gel column layer Analysis; gradient elution with chloroform-acetone solution; the 9:1 part of the eluent was further separated and purified by high-pressure liquid chromatography to obtain the desired biphenyl compound. The activity test shows that the compound has good inhibitory effect on tobacco mosaic virus. The compound of the invention has simple structure and good compound activity, and can be used as a leading compound for resisting tobacco mosaic virus. |