Using CCCC(=O)NNC(=O)c1nn(-c2ccc(Cl)cc2Cl)c(-c2ccc(Cl)cc2)c1C to produce CCCc1nnc(-c2nn(-c3ccc(Cl)cc3Cl)c(-c3ccc(Cl)cc3)c2C)o1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.