Using COc1ccc(-c2nnc(SC)nc2-c2ccc(OC)cc2)cc1, CO to produce COc1ccc(-c2nnc(OC)nc2-c2ccc(OC)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.