3.1.8.1 aryldialkylphosphatase; organophosphate hydrolase; paraoxonase; A-esterase; aryltriphosphatase; organophosphate esterase; esterase B1; esterase E4; paraoxon esterase; pirimiphos-methyloxon esterase; OPA anhydrase (ambiguous); organophosphorus hydrol • • •