Application of C21 steroid compounds 1-8 of cynanchum paniculatum in preparation of anti-TSWV active products
A technology of steroids and compounds, applied in the field of biological pesticides, can solve problems such as
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[0018] Compound extraction and separation:
[0019] The dried rhizomes of Xu Changqing were crushed and extracted three times by reflux with 95% methanol, two hours each time, concentrated to obtain the total extract, dissolved in water and extracted three times with dichloromethane. The dichloromethane layer was mixed with 60-80 mesh silica gel, and the silica gel (200-300 mesh column) was used for gradient elution, and the eluent was petroleum ether-acetone (1:0 to 1:2) to dichloromethane- Methanol (10:1 to 0:1). The same components were combined to obtain 8 components (1-8). Among them, petroleum ether / acetone 2:1 partial silica gel column chromatography, reverse RP-18 column, SephadexLH- 20 gel column, and more detailed separation by semi-preparative and preparative column HPLC, etc., to obtain compound 1-8.
[0020] The compound 1-8 structural formula that obtains with above-mentioned method is as follows:
[0021]
[0022] method
[0023] 1 Preparation of poison so...
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