Desmiflavanoside, a New Bioactive Flavonoid Glycoside Isolated from Desmidorchis flava

A new flavonoid glycoside, named desmiflavanoside (1), was isolated from the MeOH extract of Desmidorchis flava (N.E.Br.) Meve & Liede, and its structure was elucidated based on 1D and 2D NMR spectroscopic techniques as well as mass spectrometry. Preliminary studies demonstrated that although compound 1 is moderately cytotoxic at lower concentrations, its activity plateaus at higher concentrations. Notably, compound 1 demonstrated a significant dose-dependent response to lipid peroxidation and that its antilipid peroxidation was similar (89.6 ± 0.81%) to the known standard (BHT; 91.3 ± 0.49%; p < 0.051). On the other hand, the flavone glycoside 1 did not show inhibitory effects against urease and acetylcholinesterase enzymes.