Task: Answer the multiple-choice question.
Query: Which drug exhibits a 21.498\% 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] COc1ccc(CNC(=O)CN(c2cccc([N+](=O)[O-])c2)S(C)(=O)=O)cc1
[b] COc1ccccc1NC(=O)Nc1cc(F)ccc1F
Answer: b. COc1ccccc1NC(=O)Nc1cc(F)ccc1F
{#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#}
1-(2,5-difluorophenyl)-3-(2-methoxyphenyl)urea