Task: Answer the multiple choice question.
Query: Which compound exhibits a 2.229\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a. COc1nc(OC/C(N)=N/O)nc(N2CCOCC2)n1
b. CCCC1Cc2c(sc(N)c2C#N)CO1
Answer: b. CCCC1Cc2c(sc(N)c2C#N)CO1
{#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#}
CCCC1Cc2c(sc(N)c2C#N)CO1
CCCC1Cc2c(sc(N)c2C#N)CO1
2-amino-5-propyl-5,7-dihydro-4H-thieno[2,3-c]pyran-3-carbonitrile