PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19088945-5 2008 The flunitrazepam-induced head twitch response was antagonized by ketanserin, a 5- HT(2A) receptor antagonist. Flunitrazepam 4-17 5-hydroxytryptamine (serotonin) receptor 2A Mus musculus 80-98