[{"from": "human", "value": "What can you tell me about this molecule? [C][C@@H1][Branch2][=Branch1][O][C@H1][Branch2][Ring1][Ring2][O][C@H1][Ring1][Branch1][N][C][=C][Branch1][#Branch2][C][=Branch1][=Branch1][=N][C][Ring1][=Branch1][=O][N][Br][C][O][P][=Branch1][C][=O][Branch1][C][O][O][C@H1][C][C@@H1][Branch1][#C][O][C@@H1][Ring1][Branch1][C][O][P][=Branch1][C][=O][Branch1][C][O][O][N][C][=C][Branch1][=N][C][=Branch1][C][=O][N][C][=Branch1][Ring2][=N][Ring1][#Branch1][N][N][=C][Ring1][O][Br][O].[C][C@@H1][Branch2][=Branch1][O][C@H1][Branch2][Ring1][Ring2][O][C@H1][Ring1][Branch1][N][C][=C][Branch1][#Branch2][C][=Branch1][=Branch1][=N][C][Ring1][=Branch1][=O][N][Br][C][O][P][=Branch1][C][=O][Branch1][C][O][O][C@H1][C][C@@H1][Branch1][#C][O][C@@H1][Ring1][Branch1][C][O][P][=Branch1][C][=O][Branch1][C][O][O][N][C][=C][Branch1][=N][C][=Branch1][C][=O][N][C][=Branch1][Ring2][=N][Ring1][#Branch1][N][N][=C][Ring1][O][Br][O]"}, {"from": "gpt", "value": "The molecule is a double-stranded DNA polynucleotide consisting of two complementary strands consisting of repeating units of brominated guanosine and deoxycytidine residues, all residues in each strand being connected by 3'->5' phosphodiester linkages. The sites of bromination are at C-8 of guanine and C-5 of cytosine, although not all these sites are brominated, with bromination at the guanine C-8 predominating. It contains a brominated poly[d(GC)]."}]