Using CSC[C@@H](NCc1c[nH]c2c(O)ncnc12)[C@H]1COC(C)(C)O1 to produce CSC[C@@H](NCc1c[nH]c2c(=O)[nH]cnc12)[C@H](O)CO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.