Using CCOC(=O)c1cc(Nc2ncnc3cc[nH]c23)ccc1Oc1ccccc1 to produce O=C(O)c1cc(Nc2ncnc3cc[nH]c23)ccc1Oc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.