Using COc1ccc(C(=O)c2cc(C#N)c3ccc4ccccc4n23)cc1 to produce COc1ccc(C(O)c2cc(C#N)c3ccc4ccccc4n23)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.