Task: Answer the MCQ question.
Question: Which compound has a 9.987\% human ether-à-go-go related gene (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: COc1cccc(Cn2nc(C(=O)O)c3ccccc3c2=O)c1
b: O=c1[nH]c2cc([N+](=O)[O-])c(NCCO)c([N+](=O)[O-])c2[nH]1
c: COCCCNC(=S)NNC(=S)Nc1ccc(OC)cc1
Answer: b. O=c1[nH]c2cc([N+](=O)[O-])c(NCCO)c([N+](=O)[O-])c2[nH]1
{#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]c2cc([N+](=O)[O-])c(NCCO)c([N+](=O)[O-])c2[nH]1
O=c1[nH]c2cc([N+](=O)[O-])c(NCCO)c([N+](=O)[O-])c2[nH]1
5-(2-hydroxyethylamino)-4,6-dinitro-1,3-dihydrobenzimidazol-2-one