Using O=C(Cl)N1CCOCC1, CCCn1c(COCC)nc2c(N)nc3ccc(O)cc3c21 to produce CCCn1c(COCC)nc2c(N)nc3ccc(OC(=O)N4CCOCC4)cc3c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.