Using COCCl, C[C@H](c1ccccc1)N1C(=O)N[C@@H]2C(=O)OC[C@@H]21 to produce COCN1C(=O)N([C@H](C)c2ccccc2)[C@H]2COC(=O)[C@H]21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.