The molecule is a purine ribonucleoside 5'-triphosphate that is ATP in which position 2 on the adenine moiety is substituted by a hydroxy group. It derives from an ATP.
[[(2R,3S,4R,5R)-5-(6-amino-2-oxo-1H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl] phosphono hydrogen phosphate