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Updated: Dec 23, 2025

Functionalized Spirocyclic Heterocycle Synthesis and Cytotoxicity Assay
Published on: February 9, 2021
Synthesis and Cytotoxic Activity of Azine Derivatives of 6-Hydroxyxanthanodiene
Margarita E Neganova1, Sergey G Klochkov1, Sergey A Pukhov1
1Institute of Physiologically Active Compounds of Russian Academy of Sciences, 1 Severny pr., Chernogolovka, Moscow Region, 142432, Russian Federation.
Background:
The conjugates of the sesquiterpene lactone of the eremophilane series of 6- hydroxyxanthanodiene with hydrogenated azines (piperidines and piperazines) have been synthesized and identified by NMR spectrometer.
Objective:
A lactone with an unusual skeleton "6-hydroxyxanthanodiene" was extracted from the plant Elecampane (Inula helenium L) and identified various species with NMR spectrometer.
Methods:
The cytotoxic, mitochondrial, and antioxidant activities on different tumor lines such as A549, HCT116, RD and Jurkat were investigated and determined possible mechanisms.
Results:
The results showed that the most potent compound was IIIi exhibiting highest cytotoxicity against RD cells (IC50 25.23 ± 0.04 μM), depolarized the mitochondrial membrane and was an effective antioxidant (IC50 inhibition of LP 10.68 ± 3.21 μM) without any toxic side effect on healthy cells.
Conclusion:
The conjugates of sesquiterpene lactone 6-hydroxyxanthanodiene III and hydrogenated azines may help to design potential promising anticancer drugs.
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