The molecule is a cyclic purine nucleotide that is cyclic ADP-ribose substituted at position O-2' by a phospho group. It has a role as a signalling molecule, a calcium channel agonist and a metabolite. It is a nucleotide-sugar and a cyclic purine nucleotide. It derives from a cyclic ADP-ribose. It is a conjugate acid of a 2'-phospho-cyclic ADP-ribose(3-).
[(2R,3R,4S,5R,13R,14R,15R,16R)-24-amino-3,4,8,10,14-pentahydroxy-8,10-dioxo-7,9,11,25,26-pentaoxa-17,19,22-triaza-1-azonia-8lambda5,10lambda5-diphosphapentacyclo[18.3.1.12,5.113,16.017,21]hexacosa-1(24),18,20,22-tetraen-15-yl] dihydrogen phosphate