The molecule is a cyclic purine dinucleotide that consists of AMP and GMP units cyclised via 3',5'-linkages. It is an adenyl ribonucleotide, a cyclic purine dinucleotide and a guanyl ribonucleotide. It is a conjugate acid of a c-GMP-AMP(2-).
2-amino-9-[(1S,6R,8R,9R,10S,15R,17R,18R)-17-(6-aminopurin-9-yl)-3,9,12,18-tetrahydroxy-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