Task: Answer the multiple-choice question.
Question: Which drug exhibits a 1.908\% 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, b, or c without using any other words.
Options:
a.) CCCCn1c(-c2cccs2)nc2nc3ccccc3nc21
b.) Oc1ccccc1CNn1cnnc1
c.) Cn1ccnc1SCc1cccc([N+](=O)[O-])c1
Answer: a. CCCCn1c(-c2cccs2)nc2nc3ccccc3nc21
{#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(-c2cccs2)nc2nc3ccccc3nc21
CCCCn1c(-c2cccs2)nc2nc3ccccc3nc21
3-butyl-2-(thiophen-2-yl)imidazo[4,5-b]quinoxaline