Using O=C(NC1Cc2ccccc2C1)c1cccc(Br)c1, Brc1cccnc1 to produce O=C(NC1Cc2ccccc2C1)c1cccc(-c2cccnc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.