Task: Answer the multiple choice question.
Question: Which drug exhibits a 21.514\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: CCCOc1ccc(N2C(=O)C3C(C(C)C)NC4(C(=O)c5ccccc5C4=O)C3C2=O)cc1
b: CCCN1CCN(CC(=O)Nc2nnc(C)s2)CC1
Answer: b. CCCN1CCN(CC(=O)Nc2nnc(C)s2)CC1
{#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#}
CCCN1CCN(CC(=O)Nc2nnc(C)s2)CC1
CCCN1CCN(CC(=O)Nc2nnc(C)s2)CC1
N-(5-methyl-1,3,4-thiadiazol-2-yl)-2-(4-propylpiperazin-1-yl)acetamide