Using COc1cncc(-c2ccc3c(c2)c(-c2cncc(OC)c2)nn3C2CCCCO2)c1 to produce COc1cncc(-c2ccc3[nH]nc(-c4cncc(OC)c4)c3c2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.