SMILES: CC1=CN(C(=O)NC1=O)[C@H]2C[C@@H]([C@H](O2)COP(=O)(O)O)OP(=O)(O)OC[C@@H]3[C@H](C[C@@H](O3)N4C=C(C(=O)NC4=O)C)OP(=O)(O)OC[C@@H]5[C@H](C[C@@H](O5)N6C=CC(=NC6=O)N)O
Description: The molecule is a single-stranded DNA polynucleotide consisting of a repeating sequence of two thymidine residues and one deoxycytidine residue, with all residues connected by 3'->5' phosphodiester linkages.