Antibacterial activity of compounds against different pathogenic bacterial isolates; BS1: Streptococcus sp.; BS4c: Staphylococcus sp.; BS6: Staphylococcus sp.; BS8a: Neisseria sp.; BS8b: Bacillus sp.; DMSO: Dimethyl- sulphoxide; SAHC-1: Aniline; SAHB-13: 4- amino benzoic acid; SAHC-13: Amino benzoic acid; SAHB-15: 22- amino thiophenol.