Task: Answer the multiple choice question.
Question: Which compound exhibits a 18.788\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a Cn1cc(Cl)c(-c2n[nH]c(=S)n2-c2ccccc2)n1
b O=C(O)c1ccc(N=NNc2cccc([N+](=O)[O-])c2)cc1
Answer: b. O=C(O)c1ccc(N=NNc2cccc([N+](=O)[O-])c2)cc1
{#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(O)c1ccc(N=NNc2cccc([N+](=O)[O-])c2)cc1
O=C(O)c1ccc(N=NNc2cccc([N+](=O)[O-])c2)cc1
4-[(3-nitroanilino)diazenyl]benzoic acid