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The cytotoxic and tyrosine kinase inhibitory properties of C21 steroids and iridoids from the tubers of Alocasia cucullata

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Abstract

Ten steroids and iridoids were isolated from the tubers of Alocasia cucullata (Lour.) G. Don. Among them, alocasgenin A (1) and alocasgenoside B–C (23) were new compounds and the aglycone of compound 1, obtained from the acid hydrolysis of 1, was named alocasgenol (1a). Also, for the first time, tenacigenin B (4), 17β-tenacigenin-B (5), 3-O-6-deoxy-3-O-methyl-β-d-allopyranosyl-(1→4)-β-d-oleandropyranosyl-tenacigenin C (6), marsdenoside A–B (78) and tenacigenoside A–B (910) were isolated from the genus Alocasia. The chemical structures were elucidated by the extensive analysis of spectral data and compared with the literature. By evaluation of the cytotoxic and tyrosine kinase inhibition, compounds 110, 1a and compound 2 showed significant growth inhibition against two tumour cell lines, MGC-803 and HT-29, while compounds 1, 1a, 3, 6 and 8 presented moderate inhibition. Furthermore, compound 2 had the inhibitory property against the enzyme activity biochemically.

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Acknowledgements

This study was supported by grant A1-20140371 from Project of Shanghai Education Commission within budget.

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Correspondence to Xiangwei Zheng.

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W. Peng, S. Liang, Z. Chen and X. Zheng contributed equally to this work.

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Peng, W., Liang, S., Hu, J. et al. The cytotoxic and tyrosine kinase inhibitory properties of C21 steroids and iridoids from the tubers of Alocasia cucullata . J Nat Med 70, 602–609 (2016). https://doi.org/10.1007/s11418-016-0982-4

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  • DOI: https://doi.org/10.1007/s11418-016-0982-4

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