Problem statement: Answer the MCQ question.
Question: Which compound exhibits a 4.944\% 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) CCc1ccccc1N(CC(=O)OC)S(C)(=O)=O
(b) O=C(NCc1ccc2c(c1)OCO2)c1cc2c(s1)CSC2
(c) O=C(O)CCCCCNC(=O)c1ccc(Br)cc1
(d) O=[N+]([O-])c1ccc2nccn2c1
Answer: d. O=[N+]([O-])c1ccc2nccn2c1
{#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=[N+]([O-])c1ccc2nccn2c1
O=[N+]([O-])c1ccc2nccn2c1
imidazo[1,2-a]pyridin-6-yl-oxido-oxoazanium