Compound No.

Zone of inhibition (cm)

E. coli

B. subtilis

M. smegmatis

4

1

1.4

1.3

8

1.4

1.2

3.2

9

1.3

1

2.2

10

1

1

1

11

1

1

1.2

12

1

1

1

13

1

1

1

14

1

1

1

2

2.6

3.2

3.9

Streptomycin

2.6

2.7

2.4

Ampicillin

2.8

3.5

2.3

DMSO

1

1

1