Using CCOC(=O)c1cccc(N)c1, Brc1ncc(Br)n2ncnc12 to produce CCOC(=O)c1cccc(Nc2ncc(Br)n3ncnc23)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.