Task: Answer the multiple choice question.
Question: Which compound exhibits a -2.136\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any additional words.
Options:
a c1ccc2c(SCc3cn4cccnc4n3)ncnc2c1
b CCOc1ccc(-c2c(=O)n(OCc3ccc([N+](=O)[O-])cc3)c3ccccc3[n+]2[O-])cc1
c O=C(NCc1nc2ccccc2[nH]1)C1=C[C@@H](c2ccc(Br)cc2)C[C@@H](OCc2ccc(CO)cc2)O1
Answer: b. CCOc1ccc(-c2c(=O)n(OCc3ccc([N+](=O)[O-])cc3)c3ccccc3[n+]2[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#}
CCOc1ccc(-c2c(=O)n(OCc3ccc([N+](=O)[O-])cc3)c3ccccc3[n+]2[O-])cc1
CCOc1ccc(-c2c(=O)n(OCc3ccc([N+](=O)[O-])cc3)c3ccccc3[n+]2[O-])cc1
3-(4-ethoxyphenyl)-1-[(4-nitrophenyl)methoxy]-4-oxidoquinoxalin-4-ium-2-one