Cysteine hydrolase. Can convert the prodrug olmesartan medoxomil into its pharmacologically active metabolite olmerstatan, an angiotensin receptor blocker, in liver and intestine. May also activate beta-lactam antibiotics faropenem medoxomil and lenampicillin. Strongly inhibited by p-chloromercuribenzoate (PCMB). Partially inhibited by bis-p-nitrophenylphosphate (BNPP). Not inhibited by DFP, PMSF, eserine or EDTA. Widely expressed, with highest levels in liver, followed by kidney, small intestine and colon. Present in liver and intestine (at protein level). Belongs to the dienelactone hydrolase family.