Abstract
A comparative study of 56 specimens of three medicinally-used Codonopsis taxa collected from China and 54 commercial samples of Codonopsis Radix available in Chinese, Japanese and Korean markets was carried out by quantitative analysis of seven major components: codonopyrrolidium B (1), codonopyrrolidium A (2), tangshenoside I (3), cordifolioidyne B (4), lobetyolinin (5), lobetyolin (6) and lobetyol (7). The quantitative results, based on a well-established HPLC–DAD method, indicated that the contents of these seven compounds varied considerably among the samples, not only inter-species but also intra-species. C. pilosula and C. pilosula var. modesta showed similar chemical compositions, while C. tangshen differed considerably from these two in chemical composition. The results of principal component analysis (PCA) indicated that two main groups were classified; one group mainly included C. pilosula, C. pilosula var. modesta and the commercial samples derived from these two taxa, while the other group was composed of C. tangshen and its derived commercial samples. Compound 1 was the main component in the roots of C. pilosula and C. pilosula var. modesta, while 3 and 2 had relatively high contents in the roots of C. tangshen. Therefore, 3, 2 and 1 could be chemical markers to differentiate C. tangshen from C. pilosula and C. pilosula var. modesta.
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Acknowledgments
We thank Mr. Hiroshi Kamiya, Mr. Tsuguo Yokokura and Japan Kampo Medicines Manufacturers Association, as well as Prof. Kun Zou and Prof. Junzhi Wang at Three Gorges University for helping in sample collection. We also thank Dr. Kohei Kazuma, Institute of Natural Medicine, University of Toyama for measuring the molecular weight of some compounds using a Thermo LTQ Orbitrap XL ETD mass spectrometer. This work was supported by JSPS KAKENHI Grant Numbers 21406004 and 24406005, by a grant (KHB1008) from the Japan Health Sciences Foundation, and by Expansion Program, Regional Innovation Cluster Program, Global Type (II) from MEXT, Japan.
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He, JY., Zhu, S., Goda, Y. et al. Quality evaluation of medicinally-used Codonopsis species and Codonopsis Radix based on the contents of pyrrolidine alkaloids, phenylpropanoid and polyacetylenes. J Nat Med 68, 326–339 (2014). https://doi.org/10.1007/s11418-013-0801-0
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DOI: https://doi.org/10.1007/s11418-013-0801-0