The molecule is an organic triphosphate formed by condensation between the gamma-phospho group of guanosine 5'-triphosphate and ethanol. It derives from a GTP and an ethanol.
[[(2R,3S,4R,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl] [ethoxy(hydroxy)phosphoryl] hydrogen phosphate