Using Cc1ccc2[nH]c3c(c2c1)CCN(C(=O)CNC(=O)OC(C)(C)C)C3c1cccc(O)c1 to produce Cc1ccc2[nH]c3c(c2c1)CCN(C(=O)CN)C3c1cccc(O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.