Using C1=COCCC1, O=C(CO)N1CCN(Cc2cc3nc(Cl)nc(N4CCOCC4)c3s2)CC1 to produce O=C(COC1CCCCO1)N1CCN(Cc2cc3nc(Cl)nc(N4CCOCC4)c3s2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.