Task: Answer the multiple-choice question.
Question: Which drug exhibits a -17.621\% 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, c, or d without using any other words.
Options:
[a] O=C(/C=C/c1cccc([N+](=O)[O-])c1)N1CCN(S(=O)(=O)c2cccs2)CC1
[b] CCc1sc(C(C2C(=O)CC(C)(C)CC2=O)C2C(=O)CC(C)(C)CC2=O)cc1[N+](=O)[O-]
[c] CCc1c(C)sc(NC(=O)Cn2nc(C(F)(F)F)c3c2CCCC3)c1C#N
[d] CCC(SC1=NCCS1)C(=O)Nc1ccc(S(N)(=O)=O)cc1
Answer: a. O=C(/C=C/c1cccc([N+](=O)[O-])c1)N1CCN(S(=O)(=O)c2cccs2)CC1
{#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=C(/C=C/c1cccc([N+](=O)[O-])c1)N1CCN(S(=O)(=O)c2cccs2)CC1
O=C(/C=C/c1cccc([N+](=O)[O-])c1)N1CCN(S(=O)(=O)c2cccs2)CC1
(E)-3-(3-nitrophenyl)-1-(4-thiophen-2-ylsulfonylpiperazin-1-yl)prop-2-en-1-one