Involved in the detoxification of xenobiotics and in the activation of ester and amide prodrugs. Shows low catalytic efficiency for hydrolysis of CPT-11 (7-ethyl-10-[4-(1-piperidino)-1-piperidino]- carbonyloxycamptothecin), a prodrug for camptothecin used in cancer therapeutics. This is the function of ENSG00000172828 (CES3, carboxylesterase 3).