Using C[C@H]1CNC[C@H]1NC(=O)OC(C)(C)C, CCOC(=O)c1cc(F)c(F)c(C)c1F to produce CCOC(=O)c1cc(F)c(N2C[C@H](C)[C@H](NC(=O)OC(C)(C)C)C2)c(C)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.