Table 1
IC₅₀ values of β-secretase inhibitory activity of the ethanol extract and its individual fractions from E. bicyclis

Sample	IC₅₀ value (mg/mL)*
Ethanol extract	0.70 ± 0.21^b
Hexane fraction	1.02 ± 0.11^c
Ethyl acetate fraction	0.24 ± 0.08^a
H₂O fraction	2.12 ± 0.27^d