Using O=C1NC(=O)c2ccccc21, CN(C)C(=O)c1cnc(OCC(O)CBr)s1 to produce CN(C)C(=O)c1cnc(OCC(O)CN2C(=O)c3ccccc3C2=O)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.