Problem statement: Answer the MCQ question.
Question: Which compound exhibits a 20.658\% 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) Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl
b) CCCNC(=O)CCC(NS(=O)(=O)c1ccc(C)cc1)C(=O)NCCC
c) CCOC(=O)C(=Cc1ccc(F)cc1)C(=O)OCC
d) COC(=O)c1sc2cc([N+](=O)[O-])cc(SCC(C)C)c2c1N
Answer: a. Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl
{#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#}
2,3,4,5,6-pentachlorophenol