Using Oc1cccc2c1OCO2, COc1cc2c(Cl)ncnc2cc1OCCCN1CCOCC1 to produce COc1cc2c(Oc3cccc4c3OCO4)ncnc2cc1OCCCN1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.