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Inhibition zones (mm) of synthesized 1,8-dioxooctahydroxanthenes derivatives against against gram-positive (S. aureus bacteria) and gram-negative (E. coli bacteria) microorganisms by the disc diffusion method.
| Entry | Product | S. aureus | E. coli |
|---|---|---|---|
| 1 | 3a | 4* | 0⁎⁎ |
| 2 | 3b | 3.5 | 0 |
| 3 | 3c | 0 | 0 |
| 4 | 3d | 0 | 0 |
| 5 | 3e | 0 | 0 |
| 6 | 3f | 0 | 0 |
| 7 | 3g | 0 | 0 |
| 8 | 3h | 15 | 7.5 |
| 9 | 3i | 4 | 0 |
| 10 | 3j | 3 | 0 |
Numbers are reported in millimeters.
The numbers reported are the inhibitions halos formation around the disk.
