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A phytochemical investigation on the 70% EtOH extract of the fruit of Acanthpanax senticosus resulted in the isolation of three new triterpenoids, Falcatane C (1), Acasentrioid F (2), Acasentrioid G (3) together with twenty-seven known ones (4–30). Structural elucidation of all the compounds was performed by spectral methods such as 1D or 2D (1H-1H COSY, HSQC, and HMBC), NMR spectroscopy, and high-resolution mass spectrometry. Moreover, all compounds were evaluated for their effects on H2O2-induced neurotoxicity in human neuroblastoma SH-SY5Ycells. Compounds 13 and 15 showed significant neuroprotective impact at a specific concentration, and compounds 1, 3, 5, 9, 11, 13–15, 17, 20–21, 23–25, 27, 29–30 showed moderate neuroprotective effect. The current study suggests that triterpenes in Eleutherococcus senticosus (Rupr.) Harms may play an essential role in the neuroprotective properties.
Liu et al. (Tue,) studied this question.