Urease Inhibition Activity of Compounds (5–32).

Compd	R	IC50 ± SEM (μM)	Compd	R	IC50 ± SEM (μM)
5		39 ± 1.2	19		16 ± 0.3
6		20 ± 0.5	20		12 ± 0.9
7		16 ± 0.1	21		13 ± 0.2
8		41 ± 1.2	22		31 ± 1.4
9		72 ± 1.2	23		37 ± 1.4
10		20 ± 0.5	24		13 ± 0.1
11		41 ± 1.2	25		35 ± 1.5
12		74 ± 1.3	26		12 ± 0.1
13		16 ± 0.9	27		34 ± 2.4
14		35 ± 1.2	28		14 ± 0.3
15		31 ± 1.2	29		41 ± 1.4
16		13 ± 0.2	30		12 ± 0.1
17		36 ± 1.2	31		15 ± 0.3
18		38 ± 1.4	32		15 ± 0.3
Thiourea 22 ± 2.2 μM