title: [Sleep substances: their roles and evolution].
mesh_terms: D000119:Acetylmuramyl-Alanyl-Isoglutamine / Q000031:analogs & derivatives*; D000818:Animals; D005075:Biological Evolution; D002415:Cats; D003701:Delta Sleep-Inducing Peptide; D006020:Glycopeptides; D006801:Humans; D051379:Mice; D009842:Oligopeptides / Q000032:analysis* / Q000096:biosynthesis; D015230:Prostaglandin D2; D011457:Prostaglandins D / Q000494:pharmacology; D051381:Rats; D012890:Sleep / Q000187:drug effects / Q000502:physiology*
chemical_list: D006020:Glycopeptides; D009842:Oligopeptides; D011457:Prostaglandins D; D000119:Acetylmuramyl-Alanyl-Isoglutamine; C033697:sleep-promoting factor S; D003701:Delta Sleep-Inducing Peptide; D015230:Prostaglandin D2