Task: Answer the MCQ question.
Query: Which compound has a 18.669\% hERG inhibition at 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(COc1cc2oc(=O)cc(-c3ccccc3)c2cc1Cl)NC(Cc1c[nH]c2ccc(O)cc12)C(=O)O
(b) CCN(Cc1nc(-c2ccc(OC)cc2)no1)C(=O)c1ccc2c(c1)OCO2
(c) CCCC1(c2ccccc2)NC(=O)NC1=O
(d) CCOC(=O)C1CCCN(c2nc3ccccc3nc2NS(=O)(=O)c2ccc(C)cc2)C1
Answer: c. CCCC1(c2ccccc2)NC(=O)NC1=O
{#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#}
CCCC1(c2ccccc2)NC(=O)NC1=O
CCCC1(c2ccccc2)NC(=O)NC1=O
5-phenyl-5-propylimidazolidine-2,4-dione