Using O=C(Cc1cccc(Cl)c1Cl)c1cc(Br)cnc1Cl, CCOC(=O)NN to produce CCOC(=O)NN=C(Cc1cccc(Cl)c1Cl)c1cc(Br)cnc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.