Task: Answer the multiple-choice question.
Question: Which compound has a 15.661\% human ether-à-go-go related gene (hERG) inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
(a) CCCCN=C(Nc1ccc(Cl)cc1)c1cccnc1
(b) COc1c(Cl)cc(-c2noc(C)c2C(=O)NCc2ccc3c(c2)OCO3)cc1Cl
Answer: a. CCCCN=C(Nc1ccc(Cl)cc1)c1cccnc1
{#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#}
CCCCN=C(Nc1ccc(Cl)cc1)c1cccnc1
CCCCN=C(Nc1ccc(Cl)cc1)c1cccnc1
N'-butyl-N-(4-chlorophenyl)pyridine-3-carboximidamide