Using O=C(OCC(COC(=O)c1ccccc1)OCBr)c1ccccc1, Nc1ncnc2pc[nH]c12 to produce Nc1ncnc2pcn(COC(COC(=O)c3ccccc3)COC(=O)c3ccccc3)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.