The SMILES O=C1C2C3c4ccccc4C(c4ccccc43)[C@@H]2c2nc3ccccc3n21 is not a hERG blocking compound (IC50 < 10uM).
The {#molecule |!}{SMILES__description} {SMILES#} is {herg_inhib#not &NULL}a {herg_inhib__names__noun}.