Using CCc1cccc(Cl)c1C(O)c1cn(C(c2ccccc2)(c2ccccc2)c2ccccc2)cn1 to produce CCc1cccc(Cl)c1C(O)c1c[nH]cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.