Kaempferin

Kaempferin

Kaempferol

[Synonyms] kaempferol , kaempferin, kaempferol, Swartziol, Trifolitin

【Structural formula】

[Molecular formula and molecular weight] C ₁₅ H ₁₀ O ₆ ; 286.

[Source] The dry rhizome of Kaempferia galanga L.

【Properties】Yellow powder

This product is soluble in methanol , ethanol and the like

Melting point: 276～278℃

【Purity Check】

TLC

1.

Developing agent toluene -ethyl formate -formic acid (5:4:1)

Check the 3% ethanol solution of aluminum trichloride, dry it with hot air, and check under UV light (365nm)

2.

Developing agent acetone-methanol-36% acetic acid (4:1:2)

Check the 3% ethanol solution of aluminum trichloride, dry it with hot air, and check under UV light (365nm)

High performance liquid chromatography

Column Phenomenex ODS, 5um (4.

Mobile phase methanol-0.

Detection 360nm, 254nm, 230nm

[Structural identification] 366, 323, 267, 227, 201

3322, 1660, 1614, 1509, 1379, 1317, 1253, 1176, 1089, 1008, 977, 883, 818

EI-MS m/z: 286[M]+, 258[M-CO] ⁺ , 241[M-CO-OH] ⁺ , 153,136,121,105

¹ H-NMR (CD ₃ OD) δ: 8.

¹³ C-NMR (CD ₃ OD) δ: 148.

【Storage】Dry and avoid light