The molecule is an organophosphate oxoanion obtained by deprotonation of the phosphate OH groups of cyclic di-AMP; major species at pH 7.3. It is a conjugate base of a cyclic di-AMP.
(1S,6R,8R,9R,10S,15R,17R,18R)-8,17-bis(6-aminopurin-9-yl)-3,12-dioxido-3,12-dioxo-2,4,7,11,13,16-hexaoxa-3lambda5,12lambda5-diphosphatricyclo[13.3.0.06,10]octadecane-9,18-diol