Task: Answer the multiple choice question.
Question: Which compound exhibits a 7.502\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a S=C1NC2(CCCC2)Nc2ccccc21
b O=C(c1ccncc1)N1CCN(c2ccc3ccccc3n2)CC1
c O=C(CN1CCN(CC(=O)Nc2ccccn2)CC1)Nc1ccccn1
d C/C(=N/NS(=O)(=O)c1cc(C)ccc1C)c1ccc2c(c1)OCO2
Answer: a. S=C1NC2(CCCC2)Nc2ccccc21
{#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#}
S=C1NC2(CCCC2)Nc2ccccc21
S=C1NC2(CCCC2)Nc2ccccc21
spiro[1,3-dihydroquinazoline-2,1'-cyclopentane]-4-thione