Reaction catalyzed by aryldialkylphosphatase (3.1.8.1)

		+		H2O	=			+
	ethyl 4-methyl-2-oxo-2H-chromen-7-yl methylphosphonate	+		H2O	=		ethyl methylphosphonate	+		7-hydroxy-4-methyl-2H-1-benzopyran-2-one