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. 2022 Nov:203:113358.
doi: 10.1016/j.phytochem.2022.113358. Epub 2022 Aug 14.

Target isolation of cytotoxic diterpenoid esters and orthoesters from Daphne tangutica maxim based on molecular networking

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Target isolation of cytotoxic diterpenoid esters and orthoesters from Daphne tangutica maxim based on molecular networking

Rui Guo et al. Phytochemistry. 2022 Nov.

Abstract

Guiding by LC-MS/MS analysis and the GNPS Molecular Networking, five undescribed daphnane diterpenoids, tanguticanines A-E, and eleven known analogues were discovered from the whole plants of Daphne tangutica Maxim. Their structures and absolute configurations were determined via extensive NMR spectroscopic analysis, ECD calculations, and X-ray diffraction crystallography. Tanguticanine E (5) exhibited promising cytotoxicity against the HepG2 cell line with an IC50 value of 9.93 ± 0.10 μM. Further flow cytometry experiment was performed to detect cell apoptosis, and the results indicated that cytotoxic diterpenoids (tanguticanines B, D and E, altadaphnan C, gniditrin, hirsein A and simplexin) exert their effects through induction of apoptosis.

Keywords: Cytotoxicity; Daphnane diterpenoids; Daphne tangutica Maxim; Molecular networking; Thymelaeaceae.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.