Task: Answer the multiple choice question.
Query: Which compound has a 16.064\% 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 Cc1c(C(=O)NCCN2C(=O)S/C(=C\c3cccnc3)C2=O)cccc1[N+](=O)[O-]
b O=C(NCc1ccc(Cl)cc1)Nc1ccc(F)cc1
Answer: b. O=C(NCc1ccc(Cl)cc1)Nc1ccc(F)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#}
O=C(NCc1ccc(Cl)cc1)Nc1ccc(F)cc1
O=C(NCc1ccc(Cl)cc1)Nc1ccc(F)cc1
1-[(4-chlorophenyl)methyl]-3-(4-fluorophenyl)urea