Using COC(=O)C(C)(Cc1ccc(OC)cc1)NC(=O)OC1C2CC3CC(C2)CC1C3 to produce COc1ccc(CC(C)(NC(=O)OC2C3CC4CC(C3)CC2C4)C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.