Using O=C1CCCN1, COC(=O)c1ccccc1NCc1ccnc(Br)c1 to produce COC(=O)c1ccccc1NCc1ccnc(N2CCCC2=O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.