Publication: A quick and convenient <sup>1</sup>H quantitative NMR method for determination of bioactive pyranocoumarins from Clausena excavata
2
Issued Date
2021-10-01
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18767486
18743900
18743900
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2-s2.0-85114747893
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Mahidol University
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SCOPUS
Bibliographic Citation
Phytochemistry Letters. Vol.45, (2021), 126-131
Suggested Citation
Norrachon Sakarat, Pannaporn Prapapongpan, Sorachai Sae-Lim, Tharinee Saleepochn, Boonsong Kongkathip, Ngampong Kongkathip, Sujitra Yakhampom, Jetsada Wongprom, Pitak Chuawong A quick and convenient <sup>1</sup>H quantitative NMR method for determination of bioactive pyranocoumarins from Clausena excavata. Phytochemistry Letters. Vol.45, (2021), 126-131. doi:10.1016/j.phytol.2021.08.011 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/75574
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Title
A quick and convenient <sup>1</sup>H quantitative NMR method for determination of bioactive pyranocoumarins from Clausena excavata
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Abstract
Clausena excavata, a shrub in the Rutaceae family, has been used in traditional medicine to alleviate cold, malaria, abdominal pain, bacterial infection, and HIV infection. The major biologically active constituents in the rhizomes and roots of C. excavata are the three pyranocoumarins; clausenidin, dentatin, and nordentatin. Due to the medicinal values of this plant, we have developed a quick and convenient qHNMR method to quantify clausenidin, dentatin, and nordentatin from the rhizomes and roots of C. excavata collected from six geographical locations throughout Thailand. The dried and powdered samples were extracted with deuterated methanol. The parameters for 1H NMR measurements were optimized according to the measured T1 relaxation time of the protons from the bioactive pyranocoumarins and of 2,3,5,6-tetrachloronitrobenzene (TCNB), the internal standard. HPLC assays were also conducted to verify the results obtained from the qHNMR method. The amount of clausenidin, dentatin, and nordentatin varied from different geographical locations, and the results from the qHNMR method were comparable to those obtained from the HPLC assays. The reported qHNMR method was quick, more convenient, and more applicable to large-scale quality control or screening than conventional HPLC methodology. The method developed herein is beneficial to the pharmaceutical and health industries.