Using O=C1CC(=O)N(c2ccccc2)c2cc(Cl)ccc2N1, C1CO1 to produce O=C1CC(=O)N(c2ccccc2)c2cc(Cl)ccc2N1CCO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.