Using NCCOCCO, CC(=O)Nc1nccc2c(C(=O)c3c(Cl)cc(C(=O)O)cc3Cl)c[nH]c12 to produce CC(=O)Nc1nccc2c(C(=O)c3c(Cl)cc(C(=O)NCCOCCO)cc3Cl)c[nH]c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.