The SMILES O=C1CC(c2cccc([N+](=O)[O-])c2)c2c(ccc3ccccc23)N1 is not a hERG blocking compound (IC50 < 10uM).
The {#molecule |!}{SMILES__description} {SMILES#} is {herg_inhib#not &NULL}a {herg_inhib__names__noun}.