Task: Answer the multiple-choice question.
Query: Which compound has a 16.079\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, d, or e without using any additional words.
Options:
[a] CCC(=O)Oc1ccc(C(=O)Nc2cccc(C(=O)c3ccccc3)c2)cc1
[b] O=c1c2ccccc2nc2n1CCN2
[c] COC(=O)c1cc(NC(=O)c2ccc(C)cc2)c(=O)oc1C
[d] Cc1ccc(N2CC(C(N)=O)CC2=O)cc1C
[e] C=CCNC(=S)NNC(=O)c1ccc([N+](=O)[O-])cc1
Answer: b. O=c1c2ccccc2nc2n1CCN2
{#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#}
O=c1c2ccccc2nc2n1CCN2
O=c1c2ccccc2nc2n1CCN2
2,3-dihydro-1H-imidazo[2,1-b]quinazolin-5-one