Using O, COc1ccc(-c2cc3n(n2)C(=O)c2ccccc2-3)cc1 to produce COc1ccc(-c2cc(-c3ccccc3C(=O)O)n[nH]2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.