Table 4.
Antimicrobial activity of compounds 1–28 isolated from E. subumbrans roots and twigs.
| Compound | MIC (μg/mL) |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Gram-positive bacteria |
Gram-negative bacteria |
Fungi |
|||||||||
| EF | MT | MRSA | SA | SP | SF | PA | ST | STR | EC | CA | |
| 1 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 128 | 128 | 128 | 128 | Inactive |
| 2 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | 128 | Inactive |
| 3 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 128 | Inactive | 128 | 128 | Inactive |
| 4 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 128 | 128 | Inactive | 128 | Inactive |
| 5 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 128 | 128 | Inactive | 128 | Inactive |
| 6 | 128 | Inactive | 32 | Inactive | Inactive | 128 | 128 | 128 | Inactive | 128 | 128 |
| 7 | 128 | 128 | 128 | 64 | 128 | 128 | 128 | 128 | Inactive | 128 | 128 |
| 8 | 128 | 128 | 128 | 64 | 128 | Inactive | 128 | 128 | Inactive | 128 | 128 |
| 9 | 2 | 2 | 4 | 2 | 2 | Inactive | 128 | 128 | Inactive | Inactive | 4 |
| 10 | 8 | 8 | 8 | 64 | 8 | 128 | 128 | Inactive | 128 | Inactive | 16 |
| 11 | 128 | 128 | 64 | 64 | 64 | Inactive | 128 | 128 | Inactive | Inactive | 128 |
| 12 | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | 128 | 128 | Inactive | Inactive | Inactive |
| 13 | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | 128 | 128 | Inactive | 128 | Inactive |
| 14 | 128 | 128 | 64 | 32 | 64 | Inactive | 128 | 128 | Inactive | 128 | 128 |
| 15 | Inactive | Inactive | Inactive | 128 | Inactive | 128 | 128 | Inactive | Inactive | 128 | Inactive |
| 16 | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | 128 | Inactive | Inactive | 128 | Inactive |
| 17 | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | 128 | Inactive | Inactive | Inactive | Inactive |
| 18 | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | 128 | 128 | Inactive | 128 | Inactive |
| 19 | Inactive | Inactive | 128 | 128 | 64 | Inactive | 128 | Inactive | Inactive | 128 | 128 |
| 20 | 128 | Inactive | Inactive | 16 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 16 |
| 21 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | Inactive | Inactive |
| 22 | Inactive | Inactive | Inactive | 128 | 128 | 128 | 128 | Inactive | Inactive | 128 | Inactive |
| 23 | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | 128 | Inactive | Inactive | 128 | Inactive |
| 24 | Inactive | Inactive | 128 | 128 | 128 | Inactive | 128 | 128 | Inactive | 128 | 128 |
| 25 | Inactive | 128 | Inactive | 128 | 128 | 128 | 128 | 128 | 128 | Inactive | Inactive |
| 26 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | Inactive | Inactive |
| 27 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | Inactive | Inactive |
| 28 | Inactive | Inactive | Inactive | Inactive | Inactive | Inactive | 128 | Inactive | Inactive | Inactive | Inactive |
| Vancomycin | 2 | 2 | 1 | 0.5 | 2 | - | - | - | - | - | 4 |
| Gentamicin | - | - | - | - | - | 4 | 4 | 1 | 0.5 | 4 | - |
Inactive at >128 μg/mL. EF = Enterococcus faecalis (ATCC 29212); MT = Micrococcus luteus (DMST 15503); MRSA = Methicillin Resistant Staphylococcus aureus (NPRC 001R); SA = Staphylococcus aureus (ATCC 25923); SP = Streptococcus pyogenes (ATCC, 19615); SF = Shigella flexneri (DMST 4423); PSA = Pseudomonas aeruginosa (ATCC 10145); STP = Salmonella typhi (DMST 22842); STM = Salmonella typhimurium (DMST 562); EC = Escherichia coli (TISTR 780); CA = Candida albicans (ATCC 10231).