Task: Answer the MCQ question.
Question: Which compound exhibits a 0.838% hERG inhibition at a concentration of 10uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a) O=[N+]([O-])c1cc(-c2cnc3ccccc3n2)ccc1Cl
b) O=C(/C=C/c1ccc([N+](=O)[O-])cc1)N1CCN(S(=O)(=O)c2cccs2)CC1
Answer: a. O=[N+]([O-])c1cc(-c2cnc3ccccc3n2)ccc1Cl
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_10uM#}{herg_central_at_10uM__units} {herg_central_at_10uM__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_10uM%}
Answer: {%multiple_choice_result}. {SMILES#}
O=[N+]([O-])c1cc(-c2cnc3ccccc3n2)ccc1Cl
O=[N+]([O-])c1cc(-c2cnc3ccccc3n2)ccc1Cl
2-(4-chloro-3-nitrophenyl)quinoxaline