Using C[N+](C)=CCl, COc1ccc(-c2cc3cc(Br)ccn3n2)cc1 to produce COc1ccc(-c2nn3ccc(Br)cc3c2C=[N+](C)C)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.