Table 1.

Antibacterial activity of tested compounds (4–11).

Compound ID	Gram positive strains		Gram negative strains
	S. aureus	S. epidermis	P. aeruginosa	E. coli
4	20	21	18	22
5	17	19	20	20
6	14	18	14	17
7	18	20	15	20
8	19	17	21	19
9	15	16	21	16
10	13	15	20	21
11	19	18	21	19
Streptomycin (standard)	21	23	24	29

Inhibitory zone diameters in mm; conc of standard 50 μg/ml, compounds 100 μg/ml.