The molecule with the SMILES O=C1CCC(c2ccc(Nc3ccncc3)cc2)=NN1 is a hERG blocker.
The molecule with the {SMILES__description} {#representation of |!}{SMILES#} is {herg_blocker#not &NULL}a {herg_blocker__names__noun}.
3-[4-(pyridin-4-ylamino)phenyl]-4,5-dihydro-1H-pyridazin-6-one