Using CC(C)C(O)CC1CCN(Cc2ccc(Cl)c(Cl)c2)CC1 to produce CC(C)C(=O)CC1CCN(Cc2ccc(Cl)c(Cl)c2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.