Using C1CCNC1, CCn1cc(C(=O)O)c(=O)c2c(F)c(F)c(F)c(F)c21 to produce CCn1cc(C(=O)O)c(=O)c2c(F)c(F)c(N3CCCC3)c(F)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.