has role biological pigment antibacterial agent iminium betaine phenazines pyocyanine(1+) virulence factor bacterial metabolite pyocyanine CHEBI:137500 chebi_ontology pyocyanin CHEBI:8653 An iminium betaine that is 5-methylphenazin-5-ium which is substituted at position 1 by an oxidanidyl group. An antibiotic pigment produced by <em>Pseudomonas aeruginosa</em>.