Using COC(=O)C1(C(=O)OC)Oc2cc3c(c(NCC(O)c4cccc(Cl)c4)c2O1)CCCC3, COCCN to produce COCCN(CCOC)C(=O)C1(C(=O)O)Oc2cc3c(c(NCC(O)c4cccc(Cl)c4)c2O1)CCCC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.