Using NNc1cc(Cl)cc(Cl)c1, CCOC(=O)CC(=O)c1ccccc1 to produce O=C1CC(c2ccccc2)=NN1c1cc(Cl)cc(Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.