Using O=C(O)c1cc(OCC(=O)N2CCC[C@H]2C(=O)NCCF)n(-c2ccccc2)n1, COC(=O)[C@@H](N)CCC(=O)OC(C)(C)C to produce COC(=O)[C@H](CCC(=O)OC(C)(C)C)NC(=O)c1cc(OCC(=O)N2CCC[C@H]2C(=O)NCCF)n(-c2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.