Using CN1CCN(CC(=O)c2ccc(Cl)cc2)C(c2ccccc2)C1 to produce CN1CCN(CC(O)c2ccc(Cl)cc2)C(c2ccccc2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.