Table 1.

The antibacterial activity of compounds B1–15.

Cp.	Gram-Positive Bacteria				Gram-Negative Bacteria
	Staphylococcus aureus ATCC 25923		Listeria monocytogenes ATCC 35152		Escherichia coli ATCC 25922		Salmonella typhimurium ATCC 13311		P. aeruginosa ATCC 27853
	Diameter (mm)	%AI	Diameter (mm)	%AI	Diameter (mm)	%AI	Diameter (mm)	%AI	Diameter (mm)	%AI
B1	14	50	18	100	14	51.8	16	72.7	19	73
B2	14	50	18	100	14	51.8	18	81.8	19	73
B3	14	50	16	88.8	14	51.8	18	81.8	16	61.5
B4	14	50	14	77.7	14	51.8	18	81.8	18	69.2
B5	14	50	14	77.7	14	51.8	18	81.8	21	80.7
B6	14	50	14	77.7	14	51.8	16	72.7	21	80.7
B7	16	57.1	12	66.6	14	51.8	16	72.7	18	69.2
B8	12	42.8	12	66.6	14	51.8	16	72.7	18	69.2
B9	14	50	18	100	16	59.2	16	72.7	20	76.9
B10	18	64.2	20	111.1	16	59.2	18	81.8	18	69.2
B11	12	42.8	8	44.4	16	59.2	18	81.8	21	80.7
B12	12	42.8	14	77.7	14	51.8	18	81.8	21	80.7
B13	12	42.8	12	66.6	14	51.8	18	81.8	21	80.7
B14	12	42.8	16	88.8	16	59.2	18	81.8	21	80.7
B15	16	57.1	10	55.5	14	51.8	18	81.8	21	80.7
CIP	28	100	18	100	27	100	22	100	26	100

The values obtained for the most active compounds are marked in bold. Cp.: Compounds; CIP: ciprofloxacin; %AI = percentage activity index ((Zone of the inhibition of synthetic compound/Zone of the inhibition of reference drug) × 100).