Task: Answer the MCQ question.
Query: Which drug exhibits a 12.726\% 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] CCn1c(=O)c(=O)[nH]c2cc(C(=O)N3CCN(c4ccccc4F)CC3)ccc21
[b] CCOc1ccc(CN2C(=O)c3ccccc3C2=O)cc1C(=O)O
Answer: a. CCn1c(=O)c(=O)[nH]c2cc(C(=O)N3CCN(c4ccccc4F)CC3)ccc21
{#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#}
CCn1c(=O)c(=O)[nH]c2cc(C(=O)N3CCN(c4ccccc4F)CC3)ccc21
CCn1c(=O)c(=O)[nH]c2cc(C(=O)N3CCN(c4ccccc4F)CC3)ccc21
4-ethyl-7-[4-(2-fluorophenyl)piperazine-1-carbonyl]-1H-quinoxaline-2,3-dione