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Three new steroidal saponins from Aspidistra letreae plants and their cytotoxic activities

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Abstract

Three new steroidal saponins, aspiletreins A–C (13), together with 2H-chromen-2-one (4), and α-tocopherol (5), were isolated from whole Aspidistra letreae plants collected in Vietnam. Their structures were elucidated by a combination of spectroscopic analyses, including 1D- and 2D-NMR, IR, and HRESIMS, and by comparison with the reported data in the literature. Compounds 13 exhibited moderate cytotoxicities against the LU-1, HeLa, MDA-MB-231, HepG2, and MKN-7 human cancer cell lines, with IC50 values ranging from 7.69 ± 0.40 to 20.46 ± 3.11 µM.

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Acknowledgements

This work was financially supported by Hue University (ID No. DHH2019-04-101) and in part by Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan (JSPS KAKENHI Grants JP17H02203 and 19H04649). We are grateful to Mr. Luong Vu Dang (Institute of Chemistry, VAST, Hanoi, Vietnam) for recording the NMR spectra.

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Correspondence to Hiroyuki Morita or Hoai Thi Nguyen.

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Ho, D.V., Hoang, H.N.T., Vo, H.Q. et al. Three new steroidal saponins from Aspidistra letreae plants and their cytotoxic activities. J Nat Med 74, 591–598 (2020). https://doi.org/10.1007/s11418-020-01395-9

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