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>

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

The molecule is a heparin decasaccharide consisting of 4-deoxy-2-O-sulfo-alpha-L-threo-hex-4-enopyranuronosyl, 2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranosyl, 2-O-sulfo-alpha-L-idopyranuronosyl, 2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranosyl, 2-O-sulfo-alpha-L-idopyranuronosyl, 2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranosyl, 2-O-sulfo-alpha-L-idopyranuronosyl, 2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranosyl, beta-D-glucopyranuronosyl, and 2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranose units joined in sequence by (1->4) linkages. Sequence: DUA2S-GlcNS6S-IdoA2S-GlcNS6S-IdoA2S-GlcNS6S-IdoA2S-GlcNS6S-GlcA-GlcNS6S. It is a heparin decasaccharide, an amino decasaccharide and an oligosaccharide sulfate.

SMILES: O=C(O)C1=CC(O)C(OS(=O)(=O)O)C(OC2C(COS(=O)(=O)O)OC(OC3C(C(=O)O)OC(OC4C(COS(=O)(=O)O)OC(OC5C(C(=O)O)OC(OC6C(COS(=O)(=O)O)OC(OC7C(C(=O)O)OC(OC8C(COS(=O)(=O)O)OC(OC9C(C(=O)O)OC(OC%10C(COS(=O)(=O)O)OC(O)C(NS(=O)(=O)O)C%10O)C(O)C9O)C(NS(=O)(=O)O)C8O)C(OS(=O)(=O)O)C7O)C(NS(=O)(=O)O)C6O)C(OS(=O)(=O)O)C5O)C(NS(=O)(=O)O)C4O)C(OS(=O)(=O)O)C3O)C(NS(=O)(=O)O)C2O)O1