Using O=C(NC12CC3CC(CC(CO)(C3)C1)C2)c1cccc(Cl)c1 to produce O=CC12CC3CC(C1)CC(NC(=O)c1cccc(Cl)c1)(C3)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.