Using CC(C)(C)OC(=O)c1c(NC(=O)OCc2ccccc2)ccc2c1OC[C@H]1CCN21 to produce CC(C)(C)OC(=O)c1c(N)ccc2c1OC[C@H]1CCN21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.