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Tongguanosinoside H
Tenacissoside H
【Structural formula】
【Molecular formula and molecular weight】C 42 H 66 O 14 ;794.
[Source] The dry cane of Marsdenia tenacissima (Roxb.
【Properties】White powder
This product is soluble in methanol
Melting point: 199~203℃
【Purity Check】
TLC
1.
Developing solvent chloroform - acetone - methanol (20:1:1)
After checking the color development of 10% sulfuric acid ethanol solution, check under sunlight and ultraviolet light (365nm)
2.
Developing solvent chloroform - ethyl acetate - formic acid (3:3:0.
After checking the color development of 10% sulfuric acid ethanol solution, check under sunlight and ultraviolet light (365nm)
High performance liquid chromatography
Phenomenex C 18 Column , 5um (4.
Mobile phase acetonitrile-water (56:44), 1ml/min
ELSD 2000ES evaporative light scattering detection, nitrogen flow rate 2.
【Structural identification】227,202
3491 (OH), 2970, 2935, 2878, 1735 (-C=O), 1702 (-C=O), 1452, 1365, 1249, 1161, 1084, 1032, 982, 917
ESI-MS m/z: 817 [M+Na] +
1 H-NMR (C 5 D 5 N) δ: 0.
13 C-NMR (C 5 D 5 N) δ: 37.
【Storage】Dry and airtight
Related link: Tungguanosinoside H