Task: Answer the multiple-choice question.
Question: Which drug exhibits a 2.456\% 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 additional words.
Options:
a) CSc1ncc(CN2CCN(CCC(C)C)C(CCO)C2)cn1
b) CCSc1nc2sc3c(c2c(=O)[nH]1)CCc1ccccc1-3
Answer: a. CSc1ncc(CN2CCN(CCC(C)C)C(CCO)C2)cn1
{#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#}
CSc1ncc(CN2CCN(CCC(C)C)C(CCO)C2)cn1
CSc1ncc(CN2CCN(CCC(C)C)C(CCO)C2)cn1
2-[1-(3-methylbutyl)-4-[(2-methylsulfanylpyrimidin-5-yl)methyl]piperazin-2-yl]ethanol