Using CC(C)(C)OC(=O)N1CCc2cccc(C(=O)NC3(C(=O)O)Cc4ccccc4C3)c2C1 to produce O=C(NC1(C(=O)O)Cc2ccccc2C1)c1cccc2c1CNCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.