Task: Answer the MCQ question.
Query: Which drug exhibits a -15.504\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any other words.
Options:
a: COC(=O)c1ccc(CN2CCc3ccccc32)cc1
b: O=C(COc1ccccc1)OCc1cc(-c2ccco2)on1
c: CCOC(=O)Cn1c(Br)nc2c1c(=O)[nH]c(=O)n2C
Answer: c. CCOC(=O)Cn1c(Br)nc2c1c(=O)[nH]c(=O)n2C
{#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#}
CCOC(=O)Cn1c(Br)nc2c1c(=O)[nH]c(=O)n2C
CCOC(=O)Cn1c(Br)nc2c1c(=O)[nH]c(=O)n2C
ethyl 2-(8-bromo-3-methyl-2,6-dioxopurin-7-yl)acetate