The molecule SMILES O=C(O)C1Nc2c(Cl)cc(Cl)cc2C2C=CCC12 is not a hERG blocking compound (IC50 less than 10uM).
The {#molecule |!}{SMILES__description} {SMILES#} is {herg_inhib#not &NULL}a {herg_inhib__names__noun}.