Table 7.

In vitro urease inhibitory activity of synthesized N′-benzylidene-4-(t-Bu)benzohydrazide derivatives (4–26).

Compounds	IC50 ± SEM (µM)	Compounds	IC50 ± SEM (µM)
4	88.75 ± 7.71	16	79.01 ± 7.53
5	56.57 ± 3.18	17	27.45 ± 1.65
6	13.33 ± 0.58	18	66.14 ± 1.79
7	64.50 ± 3.97	19	67.48 ± 4.16
8	80.01 ± 7.43	20	51.41 ± 11.50
9	63.50 ± 3.97	21	71.27 ± 2.47
10	63.54 ± 3.97	22	38.57 ± 11.54
11	63.52 ± 2.97	23	251.74 ± 6.82
12	39.57 ± 11.54	24	37.47 ± 12.54
13	80.93 ± 7.43	25	13.42 ± 0.33
14	81.21 ± 7.4	26	49.47 ± 12.74
15	82.21 ± 7.43	Thiourea	21.14 ± 0.42

SEM is the standard error of the mean, thiourea = standard for urease inhibition activity.