Vitexin rhamnoside

Vitexin rhamnoside

Rhamnosylvitexin

[Molecular formula and molecular weight] C ₂₇ H ₃₀ O ₁₄ ; 578.

【Structural formula】

[Source] The leaf of the Rosaceae Crataegus pinnatifida Bge.

【Properties】Yellow powder

This product is easily soluble in methanol

Melting point: 206.

【Purity Check】

TLC

1.

Developing solvent ethyl acetate - methanol - water (20:3:2)

After the inspection is unfolded, first inspect under ultraviolet light (254nm), then use FeCl _{3 to} develop color and inspect under visible light

2.

Developing agent toluene-methanol-formic acid (8:2:0.

After the inspection is expanded, first inspect under ultraviolet light (254nm), then use FeCl _{3 to} develop color , and then inspect the high performance liquid chromatography under visible light.

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

Mobile phase 2.

Detection wavelength 330nm

【Structural identification】270,305,327

3385(-OH), 2934, 1655 (C=O), 1612, 1572, 1506

ESI-MS m/z: 579 [M+H] ⁺

¹ H-NMR (DMSO) δ: 6.

¹³ C-NMR (DMSO) δ: 164.
0(C-2), 102.
4(C-3), 182.
1(C-4), 160.
7(C-5), 98.
3(C-6), 162.
3(C-7) , 104.
4(C-8), 155.
8(C-9), 104.
2(C-10), 121.
6(C-1'), 129.
0(C-2'), 115.
9(C-3'), 161.
2(C- 4'), 115.
9(C-5'), 129.
0(C-6'), 71.
7(C-1''), 75.
0(C-2''), 79.
9(C-3''), 70.
4(C -4''), 81.
8(C-5''), 61.
6(C-6''), 100.
3(C-1'''), 70.
6(C-2'''), 70.
2(C-3') ''), 71.
5(C-4'''), 68.
2(C-5'''), 17.
8(C-6''')
.

【Storage】Dry and airtight
.

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