Task: Answer the multiple choice question.
Question: Which compound exhibits a 21.570\% 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: COc1ccc(NC(=O)CCC(=O)NCCO)cc1
b: Cc1ccc(OCC(=O)N(Cc2ccccc2)c2c(N)n(Cc3ccccc3)c(=O)[nH]c2=O)c(C)c1
Answer: a. COc1ccc(NC(=O)CCC(=O)NCCO)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#}
COc1ccc(NC(=O)CCC(=O)NCCO)cc1
COc1ccc(NC(=O)CCC(=O)NCCO)cc1
N-(2-hydroxyethyl)-N'-(4-methoxyphenyl)butanediamide