Problem statement: Answer the multiple choice question.
Question: Which compound exhibits a 4.266\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a) O=C(CCCn1cc([N+](=O)[O-])cn1)Nc1cccnc1
b) O=C(CC(=O)N1CCN(c2ccccn2)CC1)Nc1ccc2nc3n(c(=O)c2c1)CCCCC3
Answer: a. O=C(CCCn1cc([N+](=O)[O-])cn1)Nc1cccnc1
{#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(CCCn1cc([N+](=O)[O-])cn1)Nc1cccnc1
O=C(CCCn1cc([N+](=O)[O-])cn1)Nc1cccnc1
oxido-oxo-[1-[4-oxo-4-(pyridin-3-ylamino)butyl]pyrazol-4-yl]azanium