Task: Answer the multiple choice question.
Query: Which compound has a -20.135% hERG inhibition at 10uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
[a] CCOC(=O)Cn1nc(C)c(NC(=O)c2ccc([N+](=O)[O-])c(C)c2)c1C
[b] O=C(COC(=O)c1cc([N+](=O)[O-])ccc1N1CCOCC1)c1ccccc1
Answer: b. O=C(COC(=O)c1cc([N+](=O)[O-])ccc1N1CCOCC1)c1ccccc1
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_10uM#}{herg_central_at_10uM__units} {herg_central_at_10uM__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_10uM%}
Answer: {%multiple_choice_result}. {SMILES#}
O=C(COC(=O)c1cc([N+](=O)[O-])ccc1N1CCOCC1)c1ccccc1
O=C(COC(=O)c1cc([N+](=O)[O-])ccc1N1CCOCC1)c1ccccc1
phenacyl 2-morpholin-4-yl-5-nitrobenzoate