Using COC(=O)C1(NCC[C@H](NC(=O)OC(C)(C)C)c2ccccc2)CCCC1 to produce COC(=O)C1(NCC[C@H](N)c2ccccc2)CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.