Cis-9,10-Octadecenoamide

Also known as oleamide.  A naturally-occurring derivative of oleic acid (a monounsaturated fatty acid) that induces sleep.  Research is ongoing, but in-vitro and rodent experiments indicate it may have other functions as well.  For example, it may have anxiolytic (anxiety-reducing) and anti-convulsant activities.  Oleamide derivatives also inhibit the metastasis of cancer cells in-vitro.