CUI Xue,ZHENG Zhong-fei,LI Ying,et al.Analysis of Chemical Constituents in Violae Herba and Investigation of Its Antioxidant Activity in Vitro[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(05):117-123.
CUI Xue,ZHENG Zhong-fei,LI Ying,et al.Analysis of Chemical Constituents in Violae Herba and Investigation of Its Antioxidant Activity in Vitro[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(05):117-123. DOI: 10.13422/j.cnki.syfjx.20202347.
Analysis of Chemical Constituents in Violae Herba and Investigation of Its Antioxidant Activity in Vitro
To investigate the chemical constituents and antioxidant activities of Violae Herba from the Violaceae.
Method
2
The 5 kg of Violae Herba was refluxing extracted with 3 times the amount of 95% ethanol for three times, then the extracting solution was combined, filtrated, concentrated under vacuum to get the total extract. Seven corresponding fractions were eluted with petroleum ether, dichloromethane, dichloromethane-methanol (50∶1, 10∶1, 5∶1, 2∶1) and methanol by silica gel column chromatography (60-100 mesh) on the total extract. Each fraction was isolated and purified by normal phase silica gel column chromatography, octadecylsilane chemically bonded silica (ODS) column chromatography, Sephadex LH-20 column chromatography and preparative high performance liquid chromatography (HPLC), respectively. The structures of the obtained compounds were identified by spectroscopic methods of nuclear magnetic resonance (NMR), mass spectroscopy (MS) and infrared spectroscopy (IR). Meanwhile, some of these compounds isolated from Violae Herba were carried on the 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging experiment.
Result
2
Fourteen compounds were isolated from the 95% ethanol extract of Violae Herba, including
N
-acetyl-1-ethyl ester glutamic acid (
1
),
N
-acetyl glutamic acid-1-ethyl-5-methyl ester (
2
), aurantiamide (
3
),
rel
-(2
α
,3
β
)-7-
O
-methylcedrusin (
4
), oleanolic acid (
5
),
α
-tocopherol-quinone (
6
), tectochrysin (
7
), isoscopoletin (
8
), esculetin (
9
), 24-ethylcholesta-4,24(28)
Z
-dien-3-one (
10
), stigmasta-4,25-dien-3-one (
11
),
β
-sitostenone (
12
),
β
-sitosterol (
13
), (24
R
)-3
β
-hydroxy-ethylcholest-5-en-7-one (
14
).
Conclusion
2
Compound
2
is a new natural product, compounds
1
,
4
,
6
,
7
,
10
-
12
are isolated from the genus
Viola
for the first time. Compound
9
has significant antioxidant activity, while compounds
2
,
6
and
8
have certain DPPH free radical scavenging activity.
NGAN F,CHANG R S,TABBA H D,et al.Isolation,purification and partial characterization of an active anti-HIV compound from the Chinese medicinal herb Viola yedoensis[J].Antiviral Res,1988,10(1/3):107-116.
HUANG S F,CHU S C,HSIEH Y H,et al.Viola yedoensis suppresses cell invasion by targeting the protease and NF-κB activities in A549 and Lewis lung carcinoma cells[J].Int J Med Sci,2018,15(4):280-290.
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Constituents of and Their Antioxidant Activity
Study on the Chemical Constituents from the Fruits of and the Antioxidant Activity of Forsythoside A
Chemical Constituents of and Their Antioxidant Activity
Related Author
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Related Institution
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