Using CCOC(=O)CBr, O=C1NCCC1n1nc(-c2c(-c3ccccc3)nn3ccccc23)ccc1=O to produce CCOC(=O)CN1CCC(n2nc(-c3c(-c4ccccc4)nn4ccccc34)ccc2=O)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.