In enzymology, a 3-oxolaurate decarboxylase (EC 4.1.1.56) is an enzyme that catalyzes the chemical reaction 3-oxododecanoate 2-undecanone + CO2 Hence, this enzyme has one substrate, , and two products, 2-undecanone and CO2. This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is 3-oxododecanoate carboxy-lyase (2-undecanone-forming). Other names in common use include beta-ketolaurate decarboxylase, beta-ketoacyl decarboxylase, and 3-oxododecanoate carboxy-lyase.