Using COc1ccc2cc(C(C)(OC)c3cn(C(c4ccccc4)(c4ccccc4)c4ccccc4)cn3)ccc2c1 to produce COc1ccc2cc(C(C)(OC)c3c[nH]cn3)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.