Task: Answer the multiple-choice question.
Question: Which drug exhibits a -18.800% 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 other words.
Options:
[a] CCC(C)Nc1nc(Cl)nc(NCCOc2ccccc2)n1
[b] CCCc1cc(=O)n2[nH]cnc2n1
[c] COc1ccc(/C=N\NC(=O)c2ccc([N+](=O)[O-])c(C)c2)cc1COc1ccccc1C(N)=O
[d] O=C(Cn1cc([N+](=O)[O-])cn1)Nc1ccc(Cn2cc(Br)cn2)cc1
Answer: b. CCCc1cc(=O)n2[nH]cnc2n1
{#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#}
CCCc1cc(=O)n2[nH]cnc2n1
CCCc1cc(=O)n2[nH]cnc2n1
5-propyl-1H-[1,2,4]triazolo[1,5-a]pyrimidin-7-one