Task: Answer the MCQ question.
Question: Which compound exhibits a 12.788\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a: S=c1[nH]nc2nnc3ccccc3n12
b: O=S(=O)(NCCNc1nccc(C(F)(F)F)n1)c1ccccc1
Answer: a. S=c1[nH]nc2nnc3ccccc3n12
{#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#}
S=c1[nH]nc2nnc3ccccc3n12
S=c1[nH]nc2nnc3ccccc3n12
2H-[1,2,4]triazolo[3,4-c][1,2,4]benzotriazine-1-thione