Using CCOC(=O)CBr, O=C1NCCCC1CCc1ccc2cccnc2n1 to produce CCOC(=O)CN1CCCC(CCc2ccc3cccnc3n2)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.