Problem statement: Answer the multiple-choice question.
Query: Which compound exhibits a -1.801\% 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=c1cccc(-c2ccccc2)[nH]1
b. CCOc1ccc(N2CC(C(=O)Nc3ccccc3N3CCOCC3)CC2=O)cc1
Answer: a. O=c1cccc(-c2ccccc2)[nH]1
{#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#}
6-phenyl-1H-pyridin-2-one