Table 3.

Anti-mycobacterial activities (inhibition zone: mm) of compounds 1–11 against Mycobacterium smegmatis NBRC 3207.

Compound	5 μg/disc	10 μg/disc	MIC (μg/mL)
1	9	12	32
2	–– a	––	n.d.b
3	––	––	n.d.
4	––	––	n.d.
5	––	––	n.d.
6	––	––	n.d.
7	9	13	32
8	18	24	16
9	21	26	8
10	––	12	>64
11	9	12	64
streptomycin sulfate	30	38	0.50

^a: An inhibition zone was not detected. ^b: Not determined.