PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8794469-2 1996 The separation of dextromethorphan and its main metabolite dextrorphan was performed on a polymeric C18 reversed-phase column with UV-detection using levallorphan as an internal standard. Dextromethorphan 18-34 Bardet-Biedl syndrome 9 Homo sapiens 100-103