Using O=C(CSc1ccc(Cl)c(Cl)c1)C12CC3CC(CC(C3)C1)C2 to produce OC(CSc1ccc(Cl)c(Cl)c1)C12CC3CC(CC(C3)C1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.