Problem statement: Answer the multiple-choice question.
Question: Which compound has a 1.335\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a: Cc1sc(C(=O)Nc2ccc3ccccc3c2)cc1CC(=O)O
b: CCCc1ccc2c(N)c(C#N)sc2n1
c: CCOc1ccc(C(=O)NCCCn2ccnc2)cc1
d: COC(=O)c1cn(CC(=O)N2CCCCCC2)c2ccccc12
Answer: b. CCCc1ccc2c(N)c(C#N)sc2n1
{#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#}
3-amino-6-propylthieno[2,3-b]pyridine-2-carbonitrile