User: I'm looking for the SMILES of a molecule that can be described as:
The molecule is a dihydroxyanthraquinone that is 1,2-dihydroxyanthraquinone compound carrying an additional sulfo substituent at the 3-position. The monosodium salt is the biological stain 'alizarin red S'. It has a role as a histological dye. It is a dihydroxyanthraquinone and an organosulfonic acid. It is a conjugate acid of a 3,4-dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-sulfonate.
Assistant: This is a molecule that fits your description: O=C1c2ccccc2C(=O)c2c1cc(S(=O)(=O)O)c(O)c2O
User: I'm {#searching|looking!} for the {SMILES__description} of a molecule that can be described {#by|as!}:
{description#}
Assistant: This is a molecule that fits {#your|this!} description: {SMILES#}
O=C1c2ccccc2C(=O)c2c1cc(S(=O)(=O)O)c(O)c2O
3,4-dihydroxy-9,10-dioxoanthracene-2-sulfonic acid
The molecule is a dihydroxyanthraquinone that is 1,2-dihydroxyanthraquinone compound carrying an additional sulfo substituent at the 3-position. The monosodium salt is the biological stain 'alizarin red S'. It has a role as a histological dye. It is a dihydroxyanthraquinone and an organosulfonic acid. It is a conjugate acid of a 3,4-dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-sulfonate.