Using COc1cccc(-c2c(C)sc3[nH]c(=O)cc(N)c23)c1, O=C([O-])[O-] to produce COc1cccc(-c2c(C)sc3nc(OC)cc(N)c23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.