Using C=CC(O)CC(Cc1ccc(OC(C)(C)C)cc1)NC(=O)OC(C)(C)C to produce C=CC1CC(Cc2ccc(OC(C)(C)C)cc2)NC(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.