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