Task: Answer the multiple choice question.
Question: Which compound has a 16.809\% human ether-à-go-go related gene (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) O=C(OCc1cnc(Cl)s1)c1cccs1
(b) CCOc1cc(C)nc(NCc2ccccc2)n1
Answer: a. O=C(OCc1cnc(Cl)s1)c1cccs1
{#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#}
O=C(OCc1cnc(Cl)s1)c1cccs1
O=C(OCc1cnc(Cl)s1)c1cccs1
(2-chloro-1,3-thiazol-5-yl)methylthiophene-2-carboxylate