Ginsenoside Rd

Ginsenoside Rd

Ginsenoside Rd

【Structural formula】

【Molecular formula and molecular weight】C ₄₈ H ₈₂ O ₁₈；946

[Source] The stems and leaves of Panax ginseng CAMey

【Properties】White powder

Easily soluble in water, methanol , ethanol , but insoluble in ether and benzene

Melting point: 204～206℃

【Purity Check】

TLC

1.

Developing agent: chloroform- ethyl acetate - methanol -water (15:40:22:10) lower layer solution placed below 10℃

Check 10% sulfuric acid ethanol solution, observe under sunlight and ultraviolet light (365nm)

2.

Developing solvent chloroform - methanol - water (65: 35:10) disposed below 10 ℃ lower solution

Check 10% sulfuric acid ethanol solution, observe under sunlight and ultraviolet light (365nm)

High performance liquid chromatography

Column Agilent SB C ₁₈ , 5um C ₁₈ (250mm×4.

Mobile phase acetonitrile - water (33:67), flow rate 1ml / min

Detection wavelength 210nm

【Structural identification】203

3385, 2944, 2877, 1642, 1388, 1076, 898

FAB-MS m/z: 945[Ｍ-H] ^- , 783[MH-162] ^- , 621[Ｍ-H-162-162] ^-

¹ H-NMR (C ₅ D ₅ N) δ: 0.

¹³ CNMR (C ₅ D ₅ N) δ: 39.

【Storage】Dry and airtight