Using CCOC(C)=O, COc1ccc2c(Cc3c(Cl)cncc3Cl)nnc(-n3cncn3)c2c1 to produce COc1ccc2c(Cc3c(Cl)cncc3Cl)n[n+]([O-])c(-n3cncn3)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.