Task: Answer the MCQ question.
Question: Which compound has a 11.255\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
(a) O=C(Nc1nccs1)c1ccc([N+](=O)[O-])cc1Cl
(b) CCOC(=O)C1CN(S(C)(=O)=O)c2cc(CC(=O)OC)ccc2O1
Answer: a. O=C(Nc1nccs1)c1ccc([N+](=O)[O-])cc1Cl
{#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=C(Nc1nccs1)c1ccc([N+](=O)[O-])cc1Cl
O=C(Nc1nccs1)c1ccc([N+](=O)[O-])cc1Cl
2-chloro-4-nitro-N-(1,3-thiazol-2-yl)benzamide