Using O=C1NCCc2cc(Cl)ccc21, COC(=O)Cc1cncc(Br)c1 to produce O=C(O)Cc1cncc(N2CCc3cc(Cl)ccc3C2=O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.