PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7166179-3 1982 Metabolites of tolfenamic acid appearing in human urine have been isolated and their structures determined by C-13 nuclear magnetic resonance and gas chromatography-mass spectrometry. tolfenamic acid 15-30 homeobox C13 Homo sapiens 110-114