Task: Answer the multiple-choice question.
Query: Which compound exhibits a -2.677\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a: Oc1c(Br)cc(Br)cc1Br
b: Cc1cccc(Cn2c(=O)n(-c3ccc(CC(=O)NCc4ccco4)cc3)c(=O)c3sccc32)c1
c: CCOc1ccc([N+](=O)[O-])c(N)c1
d: Cc1[nH]c2ccccc2c1/C=N/NC(=O)c1cccc([N+](=O)[O-])c1
Answer: c. CCOc1ccc([N+](=O)[O-])c(N)c1
{#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#}
5-ethoxy-2-nitroaniline