Using CCN(CC)C(=O)COc1cccc2c(C[C@@H](C)N3C(=O)c4ccccc4C3=O)c[nH]c12 to produce CCN(CC)C(=O)COc1cccc2c(C[C@@H](C)N)c[nH]c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.