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Macrolide sesquiterpene pyridine alkaloids from the stems of Tripterygium regelii

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Abstract

Nine new monomacrolide sesquiterpene pyridine alkaloids, macroregelines A–I (19), were isolated from the stems of Tripterygium regelii, along with a known alkaloid, tripfordine B. The structures of all the isolated compounds were characterized by extensive one-dimensional (1D) and two-dimensional (2D) nuclear magnetic resonance (NMR) spectroscopic analyses, as well as high-resolution electrospray-ionization mass spectrometry (HRESIMS) data. Compounds 4, 5, 6, and 8 showed antiproliferative effect on human rheumatoid arthritis synovial cell line MH7A at concentration of 20 μM, reducing their viability by 7.5, 18.0, 9.0, and 18.2 %, respectively.

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Acknowledgements

This research work was financially supported by Macao Science and Technology Development Fund (grant no. 056/2013/A2 and 063/2011/A3).

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Correspondence to Zhi-Hong Jiang or Li-Ping Bai.

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Fan, D., Li, T., Zheng, Z. et al. Macrolide sesquiterpene pyridine alkaloids from the stems of Tripterygium regelii. J Nat Med 73, 23–33 (2019). https://doi.org/10.1007/s11418-018-1232-8

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  • DOI: https://doi.org/10.1007/s11418-018-1232-8

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