Using CCOC(=O)c1c(C)cc(N)c(C(=O)O)c1C, ClCCN1CCCCC1 to produce CCOC(=O)c1c(C)cc(NCCN2CCCCC2)c(C(=O)O)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.