Using O=C(O)c1ccc(CN2C(=O)c3ccccc3C2=O)cc1, ClCCl to produce O=C(Cl)c1ccc(CN2C(=O)c3ccccc3C2=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.