Problem statement: Answer the MCQ question.
Question: Which compound has a 12.386\% human ether-à-go-go related gene (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) COc1cc(Br)c(Br)cc1N
(b) O=C(Nc1ccc2c(c1)OCCO2)C1CCN(c2nnnn2-c2ccccc2)CC1
Answer: a. COc1cc(Br)c(Br)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#}
COc1cc(Br)c(Br)cc1N
COc1cc(Br)c(Br)cc1N
4,5-dibromo-2-methoxyaniline