Problem statement: Answer the MCQ question.
Question: Which drug exhibits a 3.990\% 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(CCCO)N/N=C/c1cc(Br)ccc1O
b CCOc1ccccc1NC(=O)CN(c1cc(C)cc(C)c1)S(=O)(=O)c1c(C)noc1C
Answer: a. O=C(CCCO)N/N=C/c1cc(Br)ccc1O
{#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(CCCO)N/N=C/c1cc(Br)ccc1O
O=C(CCCO)N/N=C/c1cc(Br)ccc1O
N-[(E)-(5-bromo-2-hydroxyphenyl)methylideneamino]-4-hydroxybutanamide