The SMILES CCCn1nc(C(=O)OCn2nnc3ccccc3c2=O)c2ccccc2c1=O is not a hERG blocking compound (IC50 < 10uM).
The {#molecule |!}{SMILES__description} {SMILES#} is {herg_inhib#not &NULL}a {herg_inhib__names__noun}.