Using O=C([O-])[O-], CCc1cc(-n2cc(C(O)C(CC)CC)c3cc(-c4c(C)cccc4C)ncc32)nc(Cl)n1 to produce CCc1cc(-n2cc(C(O)C(CC)CC)c3cc(-c4c(C)cccc4C)ncc32)nc(OC)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.