You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][=C][N][Branch3][Ring2][=Branch2][S][C@H1][C][C@H1][Branch3][Ring2][Branch2][#C][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][=N][N][C][=C][C][Branch1][C][N][=N][C][Ring1][#Branch1][=O][C][C@@H1][Ring1][=N][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch2][Ring1][Ring2][N][C][=N][C][C][=Branch1][C][=O][NH1][C][Branch1][C][N][=N][C][=Ring1][Branch2][Ring1][O][C][C@@H1][Ring1][S][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][P][N][C][=N][C][=C][Branch1][C][N][N][=C][N][=C][Ring1][#Branch1][Ring1][#Branch2][C][C@@H1][Ring1][#C][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch2][Ring1][Ring2][N][C][=N][C][C][=Branch1][C][=O][NH1][C][Branch1][C][N][=N][C][=Ring1][Branch2][Ring1][O][C][C@@H1][Ring1][S][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][=N][N][C][=C][C][Branch1][C][N][=N][C][Ring1][#Branch1][=O][C][C@@H1][Ring1][=N][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][S][N][C][=C][Branch1][C][C][C][=Branch1][C][=O][NH1][C][Ring1][Branch2][=O][C][C@@H1][Ring1][=C][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch2][Ring1][Ring2][N][C][=N][C][C][=Branch1][C][=O][NH1][C][Branch1][C][N][=N][C][=Ring1][Branch2][Ring1][O][C][C@@H1][Ring1][S][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][=N][N][C][=C][C][Branch1][C][N][=N][C][Ring1][#Branch1][=O][C][C@@H1][Ring1][=N][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][=N][N][C][=C][C][Branch1][C][N][=N][C][Ring1][#Branch1][=O][C][C@@H1][Ring1][=N][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][S][N][C][=C][Branch1][C][C][C][=Branch1][C][=O][NH1][C][Ring1][Branch2][=O][C][C@@H1][Ring1][=C][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][S][N][C][=C][Branch1][C][C][C][=Branch1][C][=O][NH1][C][Ring1][Branch2][=O][C][C@@H1][Ring1][=C][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][=N][N][C][=C][C][Branch1][C][N][=N][C][Ring1][#Branch1][=O][C][C@@H1][Ring1][=N][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][P][N][C][=N][C][=C][Branch1][C][N][N][=C][N][=C][Ring1][#Branch1][Ring1][#Branch2][C][C@@H1][Ring1][#C][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch2][Ring1][Ring2][N][C][=N][C][C][=Branch1][C][=O][NH1][C][Branch1][C][N][=N][C][=Ring1][Branch2][Ring1][O][C][C@@H1][Ring1][S][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][S][N][C][=C][Branch1][C][C][C][=Branch1][C][=O][NH1][C][Ring1][Branch2][=O][C][C@@H1][Ring1][=C][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][=N][N][C][=C][C][Branch1][C][N][=N][C][Ring1][#Branch1][=O][C][C@@H1][Ring1][=N][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch2][Ring1][Ring2][N][C][=N][C][C][=Branch1][C][=O][NH1][C][Branch1][C][N][=N][C][=Ring1][Branch2][Ring1][O][C][C@@H1][Ring1][S][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][S][N][C][=C][Branch1][C][C][C][=Branch1][C][=O][NH1][C][Ring1][Branch2][=O][C][C@@H1][Ring1][=C][O][C@@H1][Branch1][Ring1][C][O][O][Ring3][Ring1][=Branch2][=Branch1][C][=Branch1][C][=O][NH1][C][Ring3][Ring1][=Branch2][=N][=O]

The molecule is a single-stranded DNA oligonucleotide consisting of five deoxyguanosine, six deoxycytidine, two deoxyadenosine and six thymidine residues connected by 3'->5' phosphodiester linkages in the sequence T-C-G-A-G-C-T-G-C-C-T-T-C-A-G-T-C-G-T. When part of a longer DNA sequence it can exist in a hairpin structure, with hydrogen bonding linking the six complementary base pairs C(2)-G(18), G(3)-C(17), A(4)-T(15), C(6)-G(15), T(6)-A(14) and G(8)-C(13). It has a role as an epitope.

SMILES: Cc1cn(C2CC(O)C(COP(=O)(O)OC3CC(n4cnc5c(=O)[nH]c(N)nc54)OC3COP(=O)(O)OC3CC(n4ccc(N)nc4=O)OC3COP(=O)(O)OC3CC(n4cc(C)c(=O)[nH]c4=O)OC3COP(=O)(O)OC3CC(n4cnc5c(=O)[nH]c(N)nc54)OC3COP(=O)(O)OC3CC(n4cnc5c(N)ncnc54)OC3COP(=O)(O)OC3CC(n4ccc(N)nc4=O)OC3COP(=O)(O)OC3CC(n4cc(C)c(=O)[nH]c4=O)OC3COP(=O)(O)OC3CC(n4cc(C)c(=O)[nH]c4=O)OC3COP(=O)(O)OC3CC(n4ccc(N)nc4=O)OC3COP(=O)(O)OC3CC(n4ccc(N)nc4=O)OC3COP(=O)(O)OC3CC(n4cnc5c(=O)[nH]c(N)nc54)OC3COP(=O)(O)OC3CC(n4cc(C)c(=O)[nH]c4=O)OC3COP(=O)(O)OC3CC(n4ccc(N)nc4=O)OC3COP(=O)(O)OC3CC(n4cnc5c(=O)[nH]c(N)nc54)OC3COP(=O)(O)OC3CC(n4cnc5c(N)ncnc54)OC3COP(=O)(O)OC3CC(n4cnc5c(=O)[nH]c(N)nc54)OC3COP(=O)(O)OC3CC(n4ccc(N)nc4=O)OC3COP(=O)(O)OC3CC(n4cc(C)c(=O)[nH]c4=O)OC3CO)O2)c(=O)[nH]c1=O