The antimicrobial activity of compounds A4 and A5 is shown
in Table 4. A4 and A5 showed high activity against fungi such
as M. ramannianus (MIC: 5–1gml−1), A. carbonarius (MIC:
10–2gml−1) and P. expansum (MIC: 2–2gml−1). Moderate
activity was also recorded against other filamentous fungi such as
A. fabae, F. culmorum and F. equiseti (MIC: 40–10gml−1) as well
as Gram-negative bacteria (E. coli, K. pneumoniae and P. aeruginosa)
and Gram-positive bacteria (B. subtilis, E. faecalis and L. monocytogenes).
However, the two yeast strains (C. albicans and S. cerevisiae)
have shown resistance (MIC: >100). The activity of A5 was more
potent than that of A4.