gr-196,429 gr-196,429 gr-196,429 is a melatonin receptor agonist with some selectivity for the mt1 subtype. it was one of the first synthetic melatonin agonists developed and continues to be used in scientific research, though it has never been developed for medical use. studies in mice have shown gr-196,429 to produce both sleep-promoting effects and alterations of circadian rhythm, as well as stimulating melatonin release. gr-196,429identifiers iupac name n-indol-1-yl)ethyl]acetamide cas number170729-12-1 ypubchem cid5311134iuphar/bps1349chemspider4470661 ychemical and physical dataformulac14h18n2o2molar mass246.308 g·mol−13d model (jsmol)interactive image smiles c23c1ccoc1ccc2ccn3ccnc(=o)c inchi inchi=1s/c14h18n2o2/c1-10(17)15-6-8-16-7-4-11-2-3-13-12(14(11)16)5-9-18-13/h2-3h,4-9h2,1h3,(h,15,17)key:ltywtnuoubbvnz-uhfffaoysa-n