pyoverdin [ Ferric pyoverdin,pyoverdin G4R,pyoverdin Pf,pyoverdine,pyoverdine PvdI ] a partly cyclic octapeptide linked to a chromophore, derived from 2,3-diamino-6,7-dihydroxyquinoline, which confers color and fluorescence to the molecule; yellow-green pigment produced by Pseudomonas