Task: Answer the multiple-choice question.
Question: Which compound has a 20.218\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a) COc1ccccc1Nc1ccc([N+](=O)[O-])cc1N
b) O=C(O)CN1C(=O)/C(=C\c2cn(CC(=O)N3CCOCC3)c3ccccc23)SC1=S
Answer: a. COc1ccccc1Nc1ccc([N+](=O)[O-])cc1N
{#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#}
COc1ccccc1Nc1ccc([N+](=O)[O-])cc1N
COc1ccccc1Nc1ccc([N+](=O)[O-])cc1N
1-N-(2-methoxyphenyl)-4-nitrobenzene-1,2-diamine