Using Nc1c(Cl)cc2c(Br)n[nH]c2c1C(=O)O, COc1cc(C(=O)O)n(-c2ncccc2Cl)n1 to produce COc1cc(-c2nc3c(Cl)cc4c(Br)n[nH]c4c3c(=O)o2)n(-c2ncccc2Cl)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.