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Anthocyanin
PraeruptorinB
【Structural formula】
[Molecular formula and molecular weight] C 24 H 26 O 7 ; 426.
[Source] The dried root of Peucedanum praeruptorum Dunn, a plant of the Umbelliferae family
【Properties】White powder
This product is easily soluble in methanol and ethyl acetate , but almost insoluble in water
Melting point: 175~180℃
Optical rotation: [α] D 25 +14.
【Purity Check】
TLC
1.
Developing solvent chloroform
Observe under UV lamp (365nm)
2.
Eluent petroleum ether (60 ~ 90 ℃) - ethyl acetate (3:1)
Observe under UV lamp (365nm)
High performance liquid chromatography
Chromatographic column Agilent XDB C 18 , 5um (4.
The mobile phase methanol - water (75:25), 1ml / min
Detection wavelength 321nm
Differential calorimetry
Start temperature 50℃, end temperature 300℃, heating rate 5℃/min
[Structural identification] 216(sh), 254, 300, 321
2980, 1725, 1645, 1600, 1483, 1454, 1374, 1231, 1150, 1048, 899, 846
EI-MS m/z: 426[M] +
1 H-NMR (CDCl 3 ) δ: 6.
13 C-NMR (CDCl 3 ) δ: 159.
【Storage】Dry and airtight