Using O=C(/C=C/CC1CCC(c2ccc(-c3cnc(Nc4cccc(Cl)c4)o3)cc2)CC1)OCc1ccccc1 to produce O=C(O)CCCC1CCC(c2ccc(-c3cnc(Nc4cccc(Cl)c4)o3)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.