The molecule with the SMILES O=C(O)c1cc2occc2[nH]1 is not a hERG blocker (>= 10uM).
The molecule with the {SMILES__description} {#representation of |!}{SMILES#} is {herg_blocker#not a hERG blocker (>= 10uM)&a hERG blocker (<10uM)}.
4H-furo[3,2-b]pyrrole-5-carboxylic acid