Using COc1cccc2c(=O)n(NC(=O)Nc3ccc(Br)cc3)cnc12 to produce O=C(Nc1ccc(Br)cc1)Nn1cnc2c(O)cccc2c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.