Table 4.

Urease inhibition activity of the synthetic compounds. All compounds tested in the concentration range of 0.5–500 µg/mL. The effect was considered significant if the inhibition was more than 60%. Acetohydroximic acid (AHA) was used as positive control. NS = not significant.

Compound	IC50 (µM)
3a	NS
3b	629
3c	151
3d	NS
3e	NS
AHA	27