Task: Answer the MCQ question.
Query: Which compound exhibits a -20.526\% 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: Cc1cnc(C(=O)Nc2ccccc2-n2cccc2)cn1
b: Cc1ccc(S(=O)(=O)Nc2ccc(N3CCN(C)CC3)nc2)cc1
Answer: a. Cc1cnc(C(=O)Nc2ccccc2-n2cccc2)cn1
{#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#}
Cc1cnc(C(=O)Nc2ccccc2-n2cccc2)cn1
Cc1cnc(C(=O)Nc2ccccc2-n2cccc2)cn1
5-methyl-N-(2-pyrrol-1-ylphenyl)pyrazine-2-carboxamide