Task: Answer the MCQ question.
Query: Which compound has a 8.375\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
(a) Fc1ccccc1N1CCN(c2nc3ccccc3n3nnnc23)CC1
(b) O=C(CSc1nnc2ccccn12)Nc1cccc(-c2nc3ccccc3s2)c1
Answer: a. Fc1ccccc1N1CCN(c2nc3ccccc3n3nnnc23)CC1
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_1uM#}{herg_central_at_1uM__units} {herg_central_at_1uM__names__noun}?
Constraint: You must select none, one or more options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{SMILES%herg_central_at_1uM%}
Answer: {%multiple_choice_result}. {SMILES#}
Fc1ccccc1N1CCN(c2nc3ccccc3n3nnnc23)CC1
Fc1ccccc1N1CCN(c2nc3ccccc3n3nnnc23)CC1
4-[4-(2-fluorophenyl)piperazin-1-yl]tetrazolo[1,5-a]quinoxaline