Task: Answer the multiple-choice question.
Query: Which compound has a 21.050% hERG inhibition at 10uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a: O=C(NCc1cc([N+](=O)[O-])ccc1O)c1ccc(Oc2ccccc2)cc1
b: CC(C)C1CC(O)(C2(O)CCCCC2)ON1
c: CC1CCN(C(=O)c2cc3ccccc3o2)CC1
d: O=C(NCc1n[nH]c(=S)n1-c1ccc(Cl)c(Cl)c1)c1ccc(S(=O)(=O)N2CCOCC2)cc1
Answer: a. O=C(NCc1cc([N+](=O)[O-])ccc1O)c1ccc(Oc2ccccc2)cc1
{#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(NCc1cc([N+](=O)[O-])ccc1O)c1ccc(Oc2ccccc2)cc1
O=C(NCc1cc([N+](=O)[O-])ccc1O)c1ccc(Oc2ccccc2)cc1
N-[(2-hydroxy-5-nitrophenyl)methyl]-4-phenoxybenzamide