Using O=C(Cl)C(Cl)(Cl)Cl, CCOC(=O)c1cccn1CC(=O)c1ccc(Cl)cc1 to produce COC(=O)c1cc(C(=O)C(Cl)(Cl)Cl)cn1CC(=O)c1ccc(Cl)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.