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Codonopsis
Lobetyolin
【Structural formula】
[Molecular formula and molecular weight] C 20 H 28 O 8 ; 396.
[Source] The dried root of Codonopsis pilosula (Franch.
【Properties】Brown-yellow block crystals
This product is easily soluble in methanol , ethanol , acetone and ethyl acetate , soluble in ether, acetic acid and chloroform , slightly soluble in benzene and water, and insoluble in carbon disulfide and petroleum ether
Melting point: 70～72℃
【Purity Check】
TLC
1.
Developing solvent n-butanol - acetic acid - water (7: 1: 0.
After checking the color development of 10% sulfuric acid ethanol solution, check under sunlight and ultraviolet light (365nm)
2.
Developing agent chloroform-methanol- glacial acetic acid (9:1:0.
After checking the color development of 10% sulfuric acid ethanol solution, check under sunlight and ultraviolet light (365nm)
High performance liquid chromatography
Column Phenomenex Gemini C 18 110A, 5um (4.
Mobile phase 0-30min, acetonitrile -water (80:20); 30-60min, acetonitrile-water (80:20)→(20:80), 1ml/min
Detection wavelength 267nm
【Structural identification】283,268,253,241,215,207
3385 (-OH), 2924, 2879, 2235 (C=C), 1626 (C=C), 1439, 1078, 1043, 949
ESI-MS m/z: 831[2M+K] + , 815[2M+Na] + , 435[M+K] + , 419[M+Na] +
1 H-NMR (CD 3 COCD 3 ) δ: 1.
13 C-NMR (CD 3 COCD 3 ) δ: 18.
【Storage】Dry and airtight
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Related Links: Qin Pi Su
