The SMILES C[N+]1=NN=C2C(C(N)=O)=NC=[N+]2C1=O represents a molecule that is not a hERG blocker.
The {SMILES__description} {SMILES#} {#represents|is from!} a molecule that is {herg_blocker#not &NULL}a {herg_blocker__names__noun}.
3-methyl-4-oxidanylidene-imidazo[5,1-d][1,2,3,5]tetrazine-3,5-diium-8-carboxamide