title: L-tryptophan as a physiological hypnotic.
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism; D006801:Humans; D006993:Hypnotics and Sedatives / Q000494:pharmacology*; D051381:Rats; D012701:Serotonin / Q000378:metabolism; D012890:Sleep / Q000187:drug effects; D014364:Tryptophan / Q000494:pharmacology*
chemical_list: D006993:Hypnotics and Sedatives; D012701:Serotonin; D014364:Tryptophan