Involved in the degradation of the Pseudomonas aeruginosa quorum sensing signal molecules HHQ (2-heptyl-4-quinolone) and PQS (2-heptyl-3-hydroxy-4-quinolone) to anthranilic acid. Probably catalyzes the hydrolysis of N-octanoylanthranilic acid to anthranilic acid. H2O + N-octanoylanthranilate = anthranilate + H(+) + octanoate Up-regulated by PQS. Belongs to the AB hydrolase superfamily.