Using CSc1nc2nc(-c3nn(Cc4ccccc4F)c4ncccc34)nc(N)c2[nH]1, O=C([O-])[O-] to produce CSc1nc2c(N)nc(-c3nn(Cc4ccccc4F)c4ncccc34)nc2n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.