SMILES: C1[C@@H]2[C@H]([C@H]([C@@H](O2)N3C=CC(=O)NC3=O)O)OP(=O)(OC[C@@H]4[C@H]([C@H]([C@@H](O4)N5C=CC(=NC5=O)N)O)OP(=O)(O1)[O-])[O-]
Description: The molecule is a cyclic pyrimidine dinucleotide that consists of CMP and UMP units cyclised via 3',5'-linkages, major species at pH 7.3.