Task: Answer the multiple-choice question.
Question: Which drug has a 20.973\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
[a] COc1ccccc1C(=O)NNC(=O)c1ccccc1Br
[b] COC(=O)c1c(NC(=O)CCN2C(=O)C3CCCCC3C2=O)sc(C)c1C
Answer: a. COc1ccccc1C(=O)NNC(=O)c1ccccc1Br
{#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#}
COc1ccccc1C(=O)NNC(=O)c1ccccc1Br
COc1ccccc1C(=O)NNC(=O)c1ccccc1Br
2-bromo-N'-(2-methoxybenzoyl)benzohydrazide