Using C[C@H](NC(=O)OC(C)(C)C)C(=O)O, COc1cc(-n2cnc3cc(-c4ccc(Cl)cc4)sc3c2=O)ccc1OCC1(O)CC(F)(F)C1 to produce COc1cc(-n2cnc3cc(-c4ccc(Cl)cc4)sc3c2=O)ccc1OCC1(OC(=O)[C@H](C)NC(=O)OC(C)(C)C)CC(F)(F)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.