Task: Answer the multiple choice question.
Question: Which drug exhibits a 4.656\% 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) CCCCn1c(=O)c(-[n+]2ccccc2)c([O-])c2ccccc21
(b) CC(C)CCNC(=O)CCC(=O)NNc1nc2ccccc2c2nc(-c3ccccc3)nn12
Answer: a. CCCCn1c(=O)c(-[n+]2ccccc2)c([O-])c2ccccc21
{#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#}
CCCCn1c(=O)c(-[n+]2ccccc2)c([O-])c2ccccc21
CCCCn1c(=O)c(-[n+]2ccccc2)c([O-])c2ccccc21
1-butyl-2-oxo-3-pyridin-1-ium-1-ylquinolin-4-olate