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Emodin methyl ether

 Last Update: 2022-06-08
 Source: Internet
 Author: User

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Emodin methyl ether

Physcion

【Structural formula】

[Molecular formula and molecular weight] C ₁₆ H ₁₂ O ₅ ; 284.

【Source】The dried roots and rhizomes of Rheum of fcinale Baill

【Properties】Yellow needle-like crystals

This product was dissolved in methanol , ethanol and the like

Melting point: 205～207℃

【Purity Check】

TLC

Eluent petroleum ether (30 ~ 60 ℃) - ethyl - carboxylic acid (15:5:1) supernatant

Inspection of UV lamp (365nm) and inspection under sunlight

Developing agent cyclohexane- chloroform - methanol -ethyl acetate-glacial acetic acid (20:5:2:81)

Inspection of UV lamp (365nm) and inspection under sunlight

High performance liquid chromatography

Column Aichrom Hypersil C ₁₈ , 5um (4.

Mobile phase methanol-0.

Detection 254nm, 225nm, 287nm

【Structural identification】433,284,264,256,224

3053, 2978, 2844, 1676, 1626, 1560, 1479, 1376, 1273, 1225, 1161, 1103, 1036, 980, 874, 850, 756, 715, 633, 611

EI-MS m/z: 284[M] ⁺ , 256[Ｍ—CO] ⁺ , 241[Ｍ—CO—CH ₃ ] ⁺ , 213[Ｍ—2CO—CH ₃ ] ⁺

¹ H-NMR (C ₅ D ₅ N) δ: 2.

¹³ C-NMR (C ₅ D ₅ N) δ: 162.

【Storage】Dry and avoid light

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