Task: Answer the MCQ question.
Question: Which drug exhibits a 13.431\% 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, d, or e without using any additional words.
Options:
a O=C1CCNc2c(Cl)cccc21
b Cc1ccc(-c2csc(NC(=O)C3CC=CCC3C(=O)O)c2C(=O)OC(C)C)cc1
c O=[N+]([O-])c1ccc(COc2cccnc2)cc1
d COc1ccc(S(=O)(=O)n2nc(OC(=O)C3CCCCC3)cc2N)cc1
e O=C(NCc1nc(-c2ccc(C(F)(F)F)cc2)no1)Nc1cc(Cl)cc(Cl)c1
Answer: a. O=C1CCNc2c(Cl)cccc21
{#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#}
8-chloro-2,3-dihydro-1H-quinolin-4-one