PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8097704-1 1993 Metabolites of nitecapone [3-(3,4-dihydroxy-5-nitrobenzylidene)-2,4-pentanedione], a potent catechol-O-methyltransferase inhibitor with gastroprotective and antiulcerogenic effects, were isolated by extraction and HPLC from dog and rat urine after enzymatic hydrolysis and as glucuronic acid and sulfate conjugates. nitecapone 15-25 catechol-O-methyltransferase Canis lupus familiaris 92-120