The SMILES Cc1nc(NC(=O)CSc2nnc(Cn3nnc4ccccc43)n2C)sc1C is not a hERG blocking compound (IC50 < 10uM).
The {#molecule |!}{SMILES__description} {SMILES#} is {herg_inhib#not &NULL}a {herg_inhib__names__noun}.