Table 3.

In vitro antibacterial activity of 3a, 3b, 3c, 3d, 3e, 3f expressed as a minimal inhibitory concentration (MIC) (µg/mL) and a minimal bactericidal concentration (MBC) (µg/mL). AMP: ampicillin, NTF: nitrofurantoin, STR: streptomycin.

Tested Strain	E. coli NCTC 8196 NCTC 8196		S. aureus ATCC 6538 ATCC 6538		S. aureus ATCC 29213 ATCC 29213		S. epidermidis ATCC 12228 ATCC 12228
Compound	MIC	MBC	MIC	MBC	MIC	MBC	MIC	MBC
3a	>512	nd	32	128	32	128	32	64
3b	32	32	32	64	32	64	16	16
3c	>512	nd	32	64	32	64	32	64
3d	128	128	256	512	256	512	256	512
3e	>512	nd	128	128	128	128	128	128
3f	256	512	16	128	16	128	16	16
NTF	8	8	16	32	16	32	8	8
AMP	4	4	1	1	2	4	1	1
STR	1	2	1	1	1	2	>512	>512

Note: nd—not determined.