Using Cc1c(O[C@@H]2CCC(C)(C)[C@@H](N3C(=O)c4ccccc4C3=O)C2)ccc2[nH]ncc12 to produce Cc1c(O[C@@H]2CCC(C)(C)[C@@H](N)C2)ccc2[nH]ncc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.