Problem statement: Answer the MCQ question.
Query: Which compound has a 26.687\% 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] O=[N+]([O-])c1ccccc1S(=O)(=O)Nc1cccnc1
[b] CCC(=O)N1c2ccccc2NC2=C(C(=O)CC(C)(C)C2)C1c1ccc(O)c(OC)c1
Answer: a. O=[N+]([O-])c1ccccc1S(=O)(=O)Nc1cccnc1
{#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#}
O=[N+]([O-])c1ccccc1S(=O)(=O)Nc1cccnc1
O=[N+]([O-])c1ccccc1S(=O)(=O)Nc1cccnc1
2-nitro-N-pyridin-3-ylbenzenesulfonamide