Task: Answer the multiple-choice question.
Question: Which compound exhibits a 18.595\% 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 other words.
Options:
a: O=C(O)c1cc(S(=O)(=O)NCCN2CCNC2=O)ccc1O
b: COc1ccc(Nc2ncc3c(n2)CC(c2ccc(C)cc2)CC3=O)cc1
c: COc1ccccc1C(C#N)c1cccc(Cl)n1
d: COc1ccccc1N1CCN(Cc2ccc(Br)o2)CC1
Answer: c. COc1ccccc1C(C#N)c1cccc(Cl)n1
{#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#}
COc1ccccc1C(C#N)c1cccc(Cl)n1
COc1ccccc1C(C#N)c1cccc(Cl)n1
2-(6-chloropyridin-2-yl)-2-(2-methoxyphenyl)acetonitrile