Problem statement: Answer the multiple choice question.
Query: Which compound has a 2.506\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any additional words.
Options:
[a] O=c1[nH]cnc2ccc([N+](=O)[O-])cc12
[b] CC1CC(C)CN(c2cc(N(C)CCO)c([N+](=O)[O-])c3nonc23)C1
[c] COC(=O)c1[nH]c2ccccc2c1NC(=O)C(C)N1CC(C)OC(C)C1
Answer: a. O=c1[nH]cnc2ccc([N+](=O)[O-])cc12
{#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=c1[nH]cnc2ccc([N+](=O)[O-])cc12
O=c1[nH]cnc2ccc([N+](=O)[O-])cc12
6-nitro-3H-quinazolin-4-one