Task: Answer the MCQ question.
Query: Which drug has a 21.238% hERG inhibition at a concentration of 10uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a.) O=c1oc2ccccc2n1Cc1ccccc1
b.) Cc1cc(C)n(CC(=O)c2ccc(Br)cc2)c(=O)c1C#N
Answer: a. O=c1oc2ccccc2n1Cc1ccccc1
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_10uM#}{herg_central_at_10uM__units} {herg_central_at_10uM__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_10uM%}
Answer: {%multiple_choice_result}. {SMILES#}
O=c1oc2ccccc2n1Cc1ccccc1
O=c1oc2ccccc2n1Cc1ccccc1
3-benzyl-1,3-benzoxazol-2-one