Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (9): 2752.doi: 10.7503/cjcu20210180

• Analytical Chemistry • Previous Articles     Next Articles

Theoretical Study on the Structures and Properties of Flavonoids in Plantain

HUANG Luoyi1, WENG Yueyue1,2, HUANG Xuhui3, WANG Chaojie1()   

  1. 1.School of Pharmaceutical Sciences,Wenzhou Medical University,Wenzhou 325035,China
    2.Department of Pharmacy,Wenzhou Central Hospital,Wenzhou 325000,China
    3.Department of Pharmacy,the Second Affiliated Hospital of Wenzhou Medical University,Wenzhou 325035,China
  • Received:2020-03-16 Online:2021-09-10 Published:2021-05-13
  • Contact: WANG Chaojie E-mail:chjwang@wmu.edu.cn
  • Supported by:
    the Zhejiang Traditional Chinese Medicine Science and Technology Project, China(2020ZB141);the Zhejiang Provincial Natural Science Foundation, China(LY16B070006);the National Natural Science Foundation of China(21177098)

Abstract:

The ωB97XD/6-311+G(2dp) method in Density Functional Theory(DFT) was used to quantitatively calculat the flavonoids in plantain, to explore the structure-activity relationship of this class of compounds and to studied the geometric structure, spectral properties and electronic structure of 13 kinds of flavonoids from plantain and dihydromyricetin. Then the reactivity indexes analysis were carried out using conceptual density functional theory. At last the pharmacokinetic platform was used to evaluate the drug-like. Based on the results of the geometry analysis, it was initially estimated that the antioxidant order of 14 flavonoids was: 10>127>13>6>4> 1498>11>5>32>1. The fitting result of nuclear magnetic resonance spectroscopy(NMR) showed that the theoretical value of NMR obtained by this method was in good agreement with the experimental value(R2>0.95). The results of electrostatic potential map on molecular surface showed that the minimum points of electrostatic potential of 14 flavonoids were near carbonyl oxygen, while the maximum points were near hydroxyl hydrogen. It was found that the maximum values on the opposite hydroxyl groups on the B ring were greater than C and A rings. According to the results of the global reactivity descriptor, it was found that the chemical potentials of compounds 12411 and 12 were lower, and the electronegativity, electrophilic index while hardness were higher, which indicating these 5 compounds had better stability and reactivity. The local reactivity descriptor further identified the nucleophilic/electrophilic reaction sites of 14 compounds. Finally, the pharmacokinetic results screened out that compounds 134612 and 13 may be as possible alternatives to dihydromyricetin drug. In the end, compounds 4 and 12 were found to have the most potential as medicines, and further experimental studies could be carried out.

Key words: Plantain, Flavonoid, Antioxidant activity, Density functional theory

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