Using O=C1NC(=O)c2ccccc21, OCCc1nnc2n1-c1ccc(Br)cc1C(c1ccccc1)=NC2 to produce O=C1c2ccccc2C(=O)N1CCc1nnc2n1-c1ccc(Br)cc1C(c1ccccc1)=NC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.