Using CCO, O=C(O)Cc1c(-c2ccc(Cl)cc2)nn(-c2ccccc2)c1Cl to produce CCOC(=O)Cc1c(-c2ccc(Cl)cc2)nn(-c2ccccc2)c1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.