Task: Answer the MCQ question.
Query: Which compound exhibits a 5.405\% 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) CCOC(=O)c1cc2sccc2n1Cc1ccccc1
b) CCOC(=O)c1ccccc1NC(=O)CSc1nc(N)cc(N)n1
Answer: a. CCOC(=O)c1cc2sccc2n1Cc1ccccc1
{#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#}
ethyl 4-benzylthieno[3,2-b]pyrrole-5-carboxylate