Problem statement: Answer the multiple-choice question.
Query: Which drug exhibits a -2.051\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
(a) NS(=O)(=O)c1cccc(NC(=O)CN2CCCc3ccccc32)c1
(b) COc1cc(OC)c(C(=O)CCC(=O)O)cc1OC
Answer: b. COc1cc(OC)c(C(=O)CCC(=O)O)cc1OC
{#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#}
COc1cc(OC)c(C(=O)CCC(=O)O)cc1OC
COc1cc(OC)c(C(=O)CCC(=O)O)cc1OC
4-oxo-4-(2,4,5-trimethoxyphenyl)butanoic acid