Task: Answer the multiple-choice question.
Question: Which drug has a 4.486% hERG inhibition at a concentration of 10uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any additional words.
Options:
a: CCO[C@H]1OC(C(=O)NCc2nc3ccccc3[nH]2)=C[C@@H](c2csc3ccccc23)[C@@H]1CCCO
b: O=C1NCCc2c1[nH]c1ccc([N+](=O)[O-])cc21
c: O=c1[nH]c(/C(Cl)=C/c2cc(Cl)ccc2O)nc2cc(Cl)ccc12
d: Cc1cc(=O)n(CCO)c(O)c1C#N
Answer: b. O=C1NCCc2c1[nH]c1ccc([N+](=O)[O-])cc21
{#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=C1NCCc2c1[nH]c1ccc([N+](=O)[O-])cc21
O=C1NCCc2c1[nH]c1ccc([N+](=O)[O-])cc21
oxido-oxo-(1-oxo-2,3,4,9-tetrahydropyrido[3,4-b]indol-6-yl)azanium