Task: Answer the multiple-choice question.
Question: Which compound has a -5.967\% 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(NCCc1cccc(Cl)c1)c1cc([N+](=O)[O-])ccc1Cl
b CC(=O)O[C@]1(C(C)=O)CC[C@H]2[C@@H]3C=C(C)C4=CC(=O)CC[C@]4(C)[C@H]3CC[C@@]21C
c CN(CCC#N)C(=O)COC(=O)/C=C/c1cccs1
d CN(C)C(=O)CCSc1nnc(-c2ccco2)o1
Answer: a. O=C(NCCc1cccc(Cl)c1)c1cc([N+](=O)[O-])ccc1Cl
{#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(NCCc1cccc(Cl)c1)c1cc([N+](=O)[O-])ccc1Cl
O=C(NCCc1cccc(Cl)c1)c1cc([N+](=O)[O-])ccc1Cl
2-chloro-N-[2-(3-chlorophenyl)ethyl]-5-nitrobenzamide