Using CC(=O)C(Br)CCn1c(=O)c2c(ncn2C)n(C)c1=O, CC(=O)CCCn1c(=O)c2c(ncn2C)n(C)c1=O to produce Cn1cnc2c1c(=O)n(CCCC(=O)CBr)c(=O)n2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.