Fig. 1.
Inhibition rates of 12 monoterpenoids to AChE activity of P. sinica in vitro. 
Notes: The concentration of all 12 monoterpenoids tested was 20 mL/L. Data are presented as number or mean ± SD. Columns with the same letters on top are not significantly different based on One-way ANOVA at p < 0.05, Duncan’s test.