Using BrBr, CCCCOc1nc(N)c2ncn(Cc3ccc(Cl)nc3)c2n1 to produce CCCCOc1nc(N)c2nc(Br)n(Cc3ccc(Cl)nc3)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.