Using CC(C)(C)n1nc(-c2ccc3c(c2)OCO3)c2c(N)ncnc21 to produce Nc1ncnc2[nH]nc(-c3ccc4c(c3)OCO4)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.