Task: Answer the MCQ question.
Query: Which compound exhibits a 15.272\% 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. [O-][n+]1cccc2ncc3cscc3c21
b. O=C(COC(=O)CCc1ccc(S(=O)(=O)N2CCOCC2)cc1)Nc1ncc(C(F)(F)F)cc1Cl
Answer: a. [O-][n+]1cccc2ncc3cscc3c21
{#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#}
[O-][n+]1cccc2ncc3cscc3c21
[O-][n+]1cccc2ncc3cscc3c21
1-oxidothieno[3,4-c][1,5]naphthyridin-1-ium