Using CC(C)(C)OC(=O)Nc1cn2nc(Cn3nnc4ccc(Br)cc43)ccc2n1 to produce Nc1cn2nc(Cn3nnc4ccc(Br)cc43)ccc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.