Using Cc1nc(CO)c2c(n1)N(Cc1ccc(-c3ccccc3-c3nnnn3C(C)(C)C)cc1)C(=O)CC2 to produce Cc1nc(CO)c2c(n1)N(Cc1ccc(-c3ccccc3-c3nnn[nH]3)cc1)C(=O)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.