Task: Answer the MCQ question.
Query: Which compound has a 15.775\% 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) CCOC(=O)c1sc(NC(=O)c2ccc(CC)s2)nc1C
(b) CCCCCCSC1=C(C#N)C(=O)NC2(CCCCC2)S1
Answer: b. CCCCCCSC1=C(C#N)C(=O)NC2(CCCCC2)S1
{#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#}
2-hexylsulfanyl-4-oxo-1-thia-5-azaspiro[5.5]undec-2-ene-3-carbonitrile