Problem statement: Answer the multiple choice question.
Question: Which drug has a 19.693\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
(a) COc1cccc(N=Nc2c(N)[nH]n3c(=O)cc(-c4ccccc4)nc23)c1
(b) O=C1CCC([N+](=O)[O-])C(c2ccccc2Br)N1
Answer: b. O=C1CCC([N+](=O)[O-])C(c2ccccc2Br)N1
{#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=C1CCC([N+](=O)[O-])C(c2ccccc2Br)N1
O=C1CCC([N+](=O)[O-])C(c2ccccc2Br)N1
6-(2-bromophenyl)-5-nitropiperidin-2-one