Using COC(=O)c1cn(C(=O)OC(C)(C)C)c2nccc(C=O)c12, CC[C@H](C)[C@@H](N)C(=O)O to produce CC[C@H](C)[C@@H](NCc1ccnc2c1c(C(=O)OC)cn2C(=O)OC(C)(C)C)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.