Using O=C(NCc1ccccn1)c1cccc(O)c1, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)COc1cccc(C(=O)NCc2ccccn2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.