Problem statement: Answer the MCQ question.
Question: Which compound exhibits a 6.840\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
[a] CCOC(=O)CSc1nnc(CNC(=O)c2cccs2)n1-c1cccc(C)c1
[b] CCCCn1c(=O)[nH]c(=O)c2c1nc(-c1ccc(CC)c([N+](=O)[O-])c1)n2C
Answer: b. CCCCn1c(=O)[nH]c(=O)c2c1nc(-c1ccc(CC)c([N+](=O)[O-])c1)n2C
{#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#}
CCCCn1c(=O)[nH]c(=O)c2c1nc(-c1ccc(CC)c([N+](=O)[O-])c1)n2C
CCCCn1c(=O)[nH]c(=O)c2c1nc(-c1ccc(CC)c([N+](=O)[O-])c1)n2C
3-butyl-8-(4-ethyl-3-nitrophenyl)-7-methylpurine-2,6-dione