Task: Answer the MCQ question.
Question: Which compound has a 3.989\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any other words.
Options:
a COc1ccccc1C(=O)NCCC(=O)NCC(C)(C)N1CCOCC1
b O=C(NCc1ccncc1)Nc1ccccc1Cl
c Cc1ccc(S(=O)(=O)NCCC(C)C)cc1[N+](=O)[O-]
Answer: b. O=C(NCc1ccncc1)Nc1ccccc1Cl
{#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(NCc1ccncc1)Nc1ccccc1Cl
O=C(NCc1ccncc1)Nc1ccccc1Cl
1-(2-chlorophenyl)-3-(pyridin-4-ylmethyl)urea