Research Article

Acetylcholinesterase Inhibitory and Antioxidant Activity of the Compounds Isolated from Vanda roxburghii

Figure 5

Inhibition of lipid peroxidation by compounds (SA, VA, DC, and GI). IC50 (μg/ml): SA, 141.60 ± 6.19; VA, 57.02 ± 2.78; DC, 44.20 ± 1.01; GI, 32.28 ± 1.10; CA, 14.10 ± 0.43. Catechin (CA) was used as a reference antioxidant. Results represent mean ± SD (n = 3). Compound 1 had no activity and was not shown. Means with different letters (a–e) differ significantly (). SA, syringaldehyde; VA, vanillin; DC, dihydroconiferyl dihydro-p-coumarate; GI, gigantol; CA, catechin.