Molecular docking of ligands with LasR receptor protein from Pseudomonas aeruginosa PAO1 showing the key hydrophobic and polar interactions of a 3-oxo-C12—HSL b 3-Isobutylhexahydropyrrolo[1,2-a]pyrazine-1,4-dione c 1,2-benzenedicarboxylic acid, bis(2-methylpropyl) ester d Sulfurous acid, 2-propyl tridecyl ester