Task: Answer the multiple-choice question.
Query: Which drug exhibits a 6.143\% 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(NCC(=O)c1ccccc1)OCc1ccc([N+](=O)[O-])cc1
[b] O=C(CSc1nc2[nH]ncc2c(=O)n1-c1ccccc1)c1ccc2c(c1)OCCO2
Answer: a. O=C(NCC(=O)c1ccccc1)OCc1ccc([N+](=O)[O-])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(NCC(=O)c1ccccc1)OCc1ccc([N+](=O)[O-])cc1
O=C(NCC(=O)c1ccccc1)OCc1ccc([N+](=O)[O-])cc1
(4-nitrophenyl)methyl N-phenacylcarbamate