Task: Answer the multiple-choice question.
Query: Which drug exhibits a 21.648\% 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] COCCCNc1nc2ccccc2nc1NS(=O)(=O)c1ccc(OC)cc1
[b] COc1ccccc1/C=C/C(=O)NCCc1ccccn1
[c] COc1cc2[nH]c(=S)n(Cc3ccccc3)c(=O)c2cc1OC
[d] CC(C)(O)C#Cc1ccc(C(=O)Nc2ccc3c(c2)OCO3)s1
Answer: b. COc1ccccc1/C=C/C(=O)NCCc1ccccn1
{#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#}
COc1ccccc1/C=C/C(=O)NCCc1ccccn1
COc1ccccc1/C=C/C(=O)NCCc1ccccn1
(E)-3-(2-methoxyphenyl)-N-(2-pyridin-2-ylethyl)prop-2-enamide