Using COc1ccc(Cn2nnc(C(N)=O)c2N)cc1, CCOC(=O)OCC to produce COc1ccc(Cn2nnc3c(=O)[nH]c(=O)[nH]c32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.