Using O=C1c2ccccc2C(=O)N1CCn1ccc(-c2ccc(Cl)c(Cl)c2)n1 to produce NCCn1ccc(-c2ccc(Cl)c(Cl)c2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.