Using CCCBr, Cn1ccnc1-c1c2c(=O)n(C)c(=O)[nH]c2nn1Cc1c[nH]c2ccc(Cl)cc12 to produce CCCn1c(=O)n(C)c(=O)c2c(-c3nccn3C)n(Cc3c[nH]c4ccc(Cl)cc34)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.