Polymyxin B nonapeptide, a cationic cyclic peptide derived by enzymatic processing from the naturally occurring peptide polymyxin B, is able to increase the permeability of the outer membrane of Gram-negative bacteria toward hydrophobic antibiotics probably by binding to the bacterial lipopolysaccharide (LPS)

Cinnamaldehyde has antipyretic activity and a sedative agent.

6-Ethoxychelerythrine has anti-bacterial activity it exhibited strong activity against Aspergillus fumigatus and methicillin-resistant Staphylococcus aureus (MRSA).