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Coprininoside Ⅱ
PicrosideⅡ
[Molecular formula and molecular weight] C 23 H 28 O 13 ; 512.
[Source] Scrophulariaceae plant Picrorhiza scrophulariiflora .
【Structural formula】
【Properties】White crystalline powder
This product is soluble in methanol
Melting point: 184~185℃
【Purity Check】
TLC
1.
Developing solvent of chloroform - methanol - formic acid (9:1: 0.
Check under UV lamp (254nm)
2.
Developing solvent ethyl acetate - formic acid - water (8:1: 1)
Check the color development of 10% sulfuric acid ethanol solution, check under sunlight after heating at 105℃
High performance liquid chromatography
Chromatographic column C 18 , 5um (4.
Mobile phase methanol-water- phosphoric acid (35:65:0.
Detection wavelength 275nm
【Structural identification】294,263,220
3406, 2933, 1709, 1655, 1597, 1516, 1288, 1070, 1016
ESI-MS m/z: 513 [M+H] +
1 H-NMR (CD 3 OD) δ: 5.
13 C-NMR (CD 3 OD) δ: 95.
【Storage】Dry and airtight
.