Using CC(=O)CC(=O)OC(C)(C)C, CO/N=C(/C(=O)CBr)C(=O)N[C@@H]1C(=O)N2C(C(=O)O)=C(CSc3nc(=O)c(O)nn3C)CS[C@H]12 to produce CC(=O)/C(=N/O)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.