Problem statement: Answer the multiple-choice question.
Query: Which compound exhibits a 6.246\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any other words.
Options:
(a) O=c1c2cc([N+](=O)[O-])ccc2nc2n1CCCC2
(b) COc1ccc(S(N)(=O)=O)cc1C(=O)N(C)CC(=O)Nc1ccc(N2CCOCC2)cc1
(c) Cc1cc(C)cc(N(CC(=O)NC2CCCC2)C(=O)CCC(=O)Nc2nc(C)cs2)c1
Answer: a. O=c1c2cc([N+](=O)[O-])ccc2nc2n1CCCC2
{#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=c1c2cc([N+](=O)[O-])ccc2nc2n1CCCC2
O=c1c2cc([N+](=O)[O-])ccc2nc2n1CCCC2
2-nitro-6,7,8,9-tetrahydropyrido[2,1-b]quinazolin-11-one