Using COc1nc2cccnc2n1C1CC(C(=O)c2nc3ccccc3[nH]2)C1 to produce COc1nc2cccnc2n1C1CC(C(O)c2nc3ccccc3[nH]2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.