Using CCc1c(CBr)c(CC)c(CBr)c(CC)c1CBr, Nc1cccc(N)n1 to produce CCc1c(CNc2cccc(N)n2)c(CC)c(CNc2cccc(N)n2)c(CC)c1CNc1cccc(N)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.