Using O=C(Cl)c1ccc(Cl)cc1Cl, CN1C(=O)CC(=O)N(C)C1=O to produce CN1C(=O)C(C(=O)c2ccc(Cl)cc2Cl)C(=O)N(C)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.