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Two new serratene triterpenes from club moss cultivars. | LitMetric
Two new serratene triterpenes, 14α,21β-dihydroxyserrat-3β-yl acetate and 3α,21β-dihydroxyserrat-14-en-23-oic acid, together with eight known compounds were isolated from two club moss cultivars, (Desv.) Ching and (Blume) Ching. 14α,21β-Ddihydroxyserrat-3β-yl acetate () was isolated from , and 3α,21β-dihydroxyserrat-14-en-23-oic acid (), an undescribed carboxylic group at C-23 position of the serratene triterpenoids, was isolated from . The structures of these new compounds were elucidated by using HR-ESIMS, UV, IR, 1D (H and C NMR spectra), 2D NMR spectra, experimental ECD spectrometry and the single-crystal X-ray analysis. Biological evaluation of 14α,21β-dihydroxyserrat-3β-yl acetate () and lycoclavanol () revealed moderate cytotoxic activity on three tumor cell lines (HepG2, A549 and HuCCA-1) whereas 3α,21β-dihydroxyserrat-14-en-23-oic acid () showed strong inhibitory effect on HuCCA-1 cells with the IC of 4.72 µM.
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