The SMILES O=C(O)CN(CCN(CC(=O)O)CC(=O)O)CC(=O)O.[Cu+2] is not a hERG blocker.
The {#molecule |!}{SMILES__description} {SMILES#} is {herg_blocker#not &NULL}a {herg_blocker__names__noun}.
copper;2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetic acid