Using C1CCNC1, CCc1cc(-c2ccc(CNC(=O)CCl)s2)c(C)[nH]c1=O to produce CCc1cc(-c2ccc(CNC(=O)CN3CCCC3)s2)c(C)[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.