Task: Answer the multiple choice question.
Query: Which compound has a 15.981\% 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] CCOC(=O)c1sc(NC(=O)C(C)C)c(C#N)c1C
[b] O=C(CS(=O)(=O)c1ccc(Br)cc1)N1CCOCC1
[c] Cc1ccc(NC(=O)Cn2c(-c3ccc(F)cc3)cnc2SCC(=O)Nc2c(C)cccc2C)cc1
[d] CCOc1ccc(NC(=O)CC(c2ccccc2)c2ccc(F)cc2)cc1
Answer: a. CCOC(=O)c1sc(NC(=O)C(C)C)c(C#N)c1C
{#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)c1sc(NC(=O)C(C)C)c(C#N)c1C
CCOC(=O)c1sc(NC(=O)C(C)C)c(C#N)c1C
ethyl 4-cyano-3-methyl-5-(2-methylpropanoylamino)thiophene-2-carboxylate