Using O=C=Nc1ccc(Cl)c(Cl)c1, NC(=O)c1c(Cl)cccc1Cl to produce O=C(NC(=O)c1c(Cl)cccc1Cl)Nc1ccc(Cl)c(Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.