Comp E.Coli K. pneumoniae S. aureus B. subtilis A. niger S. cerevisiae
IIa 45 68 49 33 59 57
IIb 48 45 38 36 32 36
IIc 27 39 31 27 36 25
IId 52 62 74 37 61 51
IIe 67 69 49 45 52 77
IIf 58 68 77 43 31 27
IIg 24 38 30 25 56 57
IIh 76 88 82 67 72 72
IIi 60 70 55 62 61 46
IIj 22 36 28 23 29 23
IIk 63 69 58 41 90 58
IIl 51 88 79 52 47 68
IIm 36 51 47 34 60 48
Norfloxacin 15 29 24 16 -- --
Ketoconazole -- -- -- -- 21 13
Table 2: Minimum inhibitory concentration values (μg/ml) of derivatives (IIa-IIm) against microbes.