Using CCOC(=O)C1(NC(=O)c2cccc3c2CCN(C(=O)OC(C)(C)C)C3)Cc2ccccc2C1 to produce CC(C)(C)OC(=O)N1CCc2c(cccc2C(=O)NC2(C(=O)O)Cc3ccccc3C2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.