Using CCCBr, CC(=O)CCCCn1cnc2c1c(=O)[nH]c(=O)n2C to produce CCCn1c(=O)c2c(ncn2CCCCC(C)=O)n(C)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.