Using CCOC(=O)C(C(C)=O)C(=O)OCC, NNc1ccc(Cl)c(Cl)c1 to produce CCOC(=O)C1C(=O)N(c2ccc(Cl)c(Cl)c2)N=C1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.