Two novel isoflavone derivatives from Ficus esquiroliana Levl. and their cytotoxic effects on cancer cells
2022
Dai, De-Cai | Xu, Xue-Feng | Yan, Hao | Zhang, Yu
Two novel isoflavone derivatives ficusavone A and B (1 and 2) together with two known biogenetically related isoflavone derivatives (3 and 4) were isolated from the stems of Ficus esquiroliana Levl. The structures of these compounds were elucidated using comprehensive spectroscopic methods. Compounds 1 and 2 represent the rare example of an isoflavone derivative of oxidative cracking of isopentene from natural products. The inhibitory activities of all compounds against HeLa, MCF-7 and A549 cells were evaluated. Compound 1 showed the cytotoxicity against the MCF-2 (IC₅₀ = 12.3 μM) and A549 (IC₅₀ = 17.8 μM) cell lines. The other compounds showed modest activities or were inactive.
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