Kaempferol methyl ester

Kaempferol methyl ester

Shanzhiside methyl ester

【Structural formula】

[Molecular formula and molecular weight] C ₁₇ H ₂₆ O ₁₁ ; 406.

[Source] Lamiophlomis rotata (Benth.

【Properties】White powder

This product is easily soluble in methanol , ethanol , and water

Melting point: 99.

【Purity Check】

TLC

1.

Developing solvent chloroform - methanol (4:1)

Check the 10% phosphomolybdic acid test solution, heat it at 105°C until the spots are clearly colored, and inspect under sunlight

2.

Developing solvent ethyl acetate - methanol (6:1)

Check 10% sulfuric acid ethanol solution, heat it at 105℃ until the spots appear clear, check under sunlight and ultraviolet light (365nm)

High performance liquid chromatography

Chromatographic column Agilent SB C ₁₈ , 5um (4.

The mobile phase methanol - water (20:80), 1ml / min

Detection 235nm

[Structural identification] 236

3405, 2930, 1693, 1643, 1301, 1080, 1041

ESI-MS m/z: 429[M+Na], 835[2M+Na]+, 267[M+Na-gle] ⁺

¹ H-NMR (CD ₃ OD) δ: 1.

¹³ C-NMR (CD ₃ OD) δ: 94.

【Storage】Dry and airtight

Related Links: 8-O-Acetyl Shanzhiside Methyl Ester