Task: Answer the multiple choice question.
Query: Which drug exhibits a 21.262\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, d, or e without using any other words.
Options:
a) O=C(/C=C/c1ccccc1Cl)NNC(=O)c1cccs1
b) Cl.N=C(N)c1ccccc1.O
c) CC(C)N=c1cc2n(-c3ccc(Cl)cc3)c3ccccc3nc-2cc1Nc1ccc(Cl)cc1
d) Oc1ccccc1-c1cc(-c2ccccc2Cl)[nH]n1
e) CCCNC(=O)c1ccc(OC)cc1OC
Answer: a. O=C(/C=C/c1ccccc1Cl)NNC(=O)c1cccs1
{#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#}
N'-[(E)-3-(2-chlorophenyl)prop-2-enoyl]thiophene-2-carbohydrazide