Table 1 Antimicrobial activity (MIC and MMC in μg/mL) of extracts and isolated compounds from R. abyssinicus as well as reference antimicrobial drugs

MeOH extract

MIC

64

128

64

64

64

64

32

MMC

128

128

128

128

128

64

32

MMC/MIC

2

1

2

2

2

1

1

EtOAc fraction

MIC

64

32

32

64

64

32

32

MMC

128

32

64

64

64

64

32

MMC/MIC

2

1

2

1

1

2

1

n-BuOH fraction

MIC

128

128

128

256

256

64

32

MMC

256

256

128

256

256

64

64

MMC/MIC

2

2

1

1

1

1

2

1

MIC

64

32

32

64

64

64

32

MMC

128

32

64

64

128

64

32

MMC/MIC

2

1

2

1

2

1

1

2

MIC

8

8

8

16

16

8

8

MMC

16

16

8

32

32

8

8

MMC/MIC

2

2

1

2

2

1

1

3

MIC

128

128

256

>256

>256

128

64

MMC

256

>256

>256

>256

>256

>256

128

MMC/MIC

2

/

/

/

/

/

2

4

MIC

16

8

8

32

32

8

8

MMC

16

16

8

32

32

8

8

MMC/MIC

1

2

1

1

1

1

1

5

MIC

32

32

32

128

128

16

16

MMC

64

32

32

256

256

32

32

MMC/MIC

2

1

1

2

2

2

2

6 + 7

MIC

16

8

8

16

16

16

8

MMC

16

16

8

16

32

16

8

MMC/MIC

1

2

1

1

2

1

1

Ref^a

MIC

0.5

8

0.5

4

4

1

2

MMC

0.5

8

0.5

4

4

1

2

MMC/MIC

1

1

1

1

1

1

1