Three new triterpenoids from the fruit of Eleutherococcus senticosus (Rupr.) Harms .

A phytochemical investigation on the 70% EtOH extract of the fruit of Acanthpanax senticosu s 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 ( 1 H- 1 H COSY, HSQC, and HMBC), NMR spectroscopy, and high-resolution mass spectrometry. Moreover, all compounds were evaluated for their effects on H 2 O 2 -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.