Dama-20S, 25S-epoxy-3beta, 12beta, 26-triol as well as extracting method and pharmaceutical application thereof
An extraction method and epoxy technology, applied in the field of medicine, can solve the problems of low malignant transformation, slow occurrence and development, etc., and achieve the effect of wide range of action and remarkable curative effect
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Embodiment 1
[0042] Take 2.5 kg of American ginseng stems and leaves, add 3 times the volume of 60% ethanol to heat and reflux for extraction, each time for 3 hours, extract 5 times in total, each time 50L, combine the extracts, recover the solvent until dry; pass the ethanol extract through a silica gel column Chromatography, eluent: CHCl 3: MeOH=90:10, and then C18 reverse phase column chromatography, eluent: MeOH: H 2 O=80:20; ethanol:water=2:4 recrystallized to obtain dammar-20S,25S-epoxy-3β,12β,26-triol.
Embodiment 2
[0044] Take 2.5 kg of American ginseng stems and leaves, add 5 times the volume of 80% ethanol to heat and reflux for extraction, 4.5 hours each time, 6 extractions in total, 50 L each time, combine the extracts, recover the solvent until dry; pass the ethanol extract through a silica gel column Chromatography, eluent: CHCl 3 : MeOH=105:20, and then through C18 reverse phase column chromatography, eluent: MeOH: H 2 O=85:15; ethanol:water=2:5 recrystallized to obtain dammar-20S,25S-epoxy-3β,12β,26-triol.
Embodiment 3
[0046] Take 2.5kg of American ginseng stems and leaves, add 8 times the volume of 95% ethanol to heat and reflux for extraction, each time for 6 hours, extract 7 times in total, each time 50L, combine the extracts, recover the solvent until dry; pass the ethanol extract through a silica gel column Chromatography, eluent: CHCl 3 : MeOH=120:30, and then through C18 reverse phase column chromatography, eluent: MeOH: H 2 O=90:10; ethanol:water=2:6 recrystallized to obtain dammar-20S,25S-epoxy-3β,12β,26-triol.
[0047] Next, the structure identification was carried out by spectroscopy methods.
[0048] See attached figure 1 , HR-ESI-MS spectrum gives a molecular weight of 477.3944[M+H] + The quasi-molecular ion peak, combined with 1 H NMR, 13 C NMR spectrum confirms that the molecular formula is C 30 h 52 o 4 . attached figure 2 , IR(KBr)cm -1 : 3363(OH); 2948, 2875(CH 3 ); 1385, 1335 (CH 2 ).
[0049] 1 H NMR (500MHz, pyridine-d 5 ) gives no ene hydrogen proton si...
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