Using COc1cc(Br)c(Nc2nnc3cncc(-c4ccccc4)n23)cc1OC to produce COc1cc(Br)c(Nc2nnc3n2C(c2ccccc2)CNC3)cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.