Table 1.

Antibacterial activity of the synthesized compounds: Agar diffusion method.

Compound No.	Gram positive		Gram negative
	Staphylococcus aureus	Bacillus cereus	Serratia marcesens	Proteus mirabilis
3	++	++	++	++
5	-	-	+	+
7	++	++	+	+
9a	+	+	+	+
9b	+	-	+	+
9c	+	+	-	-
11	+	+	+	+
12a	+++	+++	+++	+++
12b	++	+++	++	++
12c	++	++	++	++
12d	+++	++	+	++
13	+	+	+	+
16	++	++	+++	+++
17	++	+++	+++	++
18a	+	+	+++	+
18b	++	++	+++	+++

The width of the zone of inhibition indicates the potency of antibacterial activity; (-) no antibacterial activity; (+) mild activity with the diameter of the zones equal to 0.5–0.8 cm, (++) moderate activity with the diameter of the zones equal to 1.1–1.2 cm; (+++) marked high activity with the diameter of the zones equal to 1.8–2.0 cm.