The molecule is a cyclic purine nucleotide obtained by formation of a bond between positions 3' and 8 of guanosine 5'-triphosphate. It is a conjugate acid of an (8S)-3',8-cyclo-7,8-dihydroguanosine 5'-triphosphate(4-).
[[(1R,10S,11R,12R,14R)-5-amino-11,14-dihydroxy-7-oxo-13-oxa-2,4,6,9-tetrazatetracyclo[9.2.1.02,10.03,8]tetradeca-3(8),4-dien-12-yl]methoxy-hydroxyphosphoryl] phosphono hydrogen phosphate