Task: Answer the multiple-choice question.
Question: Which compound exhibits a 1.677\% 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: COCCNc1nnc(SCC(=O)NC(=O)c2ccccc2OC)s1
b: CC1(C)CC(NC(=O)Nc2ccc([N+](=O)[O-])cc2)CC(C)(C)N1
Answer: b. CC1(C)CC(NC(=O)Nc2ccc([N+](=O)[O-])cc2)CC(C)(C)N1
{#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#}
CC1(C)CC(NC(=O)Nc2ccc([N+](=O)[O-])cc2)CC(C)(C)N1
CC1(C)CC(NC(=O)Nc2ccc([N+](=O)[O-])cc2)CC(C)(C)N1
1-(4-nitrophenyl)-3-(2,2,6,6-tetramethylpiperidin-4-yl)urea