Using CSc1nc2ccc(Cn3cnc4cc(-c5nn[nH]n5)ccc43)cc2s1, O=C([O-])[O-] to produce CSc1nc2ccc(Cn3cnc4cc(-c5nnn(C)n5)ccc43)cc2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.