Task: Answer the multiple choice question.
Question: Which compound exhibits a -2.507\% 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, c, or d without using any additional words.
Options:
a. COCCn1c(-c2ccco2)csc1=Nc1cccnc1.Cl
b. N#CC1=C(N)SC(N)=C(C#N)C1Cc1ccccc1
c. O=C(NCCC1CCCCN1S(=O)(=O)c1ccc(Cl)cc1)C(=O)NCc1cccnc1
d. CCC(=Cc1ccc(CC)cn1)CC
Answer: d. CCC(=Cc1ccc(CC)cn1)CC
{#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#}
CCC(=Cc1ccc(CC)cn1)CC
CCC(=Cc1ccc(CC)cn1)CC
5-ethyl-2-(2-ethylbut-1-enyl)pyridine