Task: Answer the MCQ question.
Query: Which drug exhibits a 21.691% hERG inhibition at a concentration of 10uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a: CCCCc1cc(=O)oc2cc(OC3CCCCC3=O)ccc12
b: CCOc1ccccc1N1CCN(C(=S)Nc2ccc(S(=O)(=O)Nc3ncccn3)cc2)CC1
Answer: a. CCCCc1cc(=O)oc2cc(OC3CCCCC3=O)ccc12
{#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#}
CCCCc1cc(=O)oc2cc(OC3CCCCC3=O)ccc12
CCCCc1cc(=O)oc2cc(OC3CCCCC3=O)ccc12
4-butyl-7-(2-oxocyclohexyl)oxychromen-2-one