Using O=C1NC(=O)c2ccccc21, ClCc1nc2c(Cl)cccn2c1Br to produce O=C1c2ccccc2C(=O)N1Cc1nc2c(Cl)cccn2c1Br, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.