Rhododendron

Rhododendron

Farrerol

【Structural formula】

[Molecular formula and molecular weight] C ₁₇ H ₁₆ O ₅ ; 300.

[Source] Rhododendron dauricum L.

【Properties】White powder

This product is easily soluble in methanol

Melting point: 246.

【Purity Check】

TLC

1.

Developing agent toluene- ethyl acetate - formic acid (7:2:0.

Check the color development of 1% AlCl ₃ ethanol solution, heating at 105℃, and viewing under 365nm UV light

2.

Developing solvent n-hexane - ethyl acetate - methanol (5:5: 0.

Check the color development of 1% AlCl ₃ ethanol solution, heating at 105℃, and viewing under 365nm UV light

High performance liquid chromatography

Chromatographic column Agilent SB C ₁₈ , 10um (4.

The mobile phase methanol - water (60:40), 1ml / min

Detection wavelength 295nm

【Structural identification】212,254,297,350

3449 (-OH), 3254, 1632 (C=O), 1607 (aromatic ring), 1377, 1196, 1119,773

EI-MS m/z: 300[M] ⁺ , 180, 152

¹ H-NMR (CD ₃ OD) δ: 1.

¹³ C-NMR (CD ₃ OD) δ: 80.

【Storage】Dry and airtight
.