Task: Answer the MCQ question.
Question: Which compound exhibits a 1.239\% 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(Nc1nccs1)[C@@H]1CCCN1C(=O)c1cccs1
b: O=C(Cn1cncn1)NCc1ccccc1Br
c: O=C(CCN1C(=O)c2cccc3cccc(c23)C1=O)NCC1CCCO1
d: O=C(Cc1ccccc1)N/N=C/c1ccc([N+](=O)[O-])s1
Answer: a. O=C(Nc1nccs1)[C@@H]1CCCN1C(=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#}
O=C(Nc1nccs1)[C@@H]1CCCN1C(=O)c1cccs1
O=C(Nc1nccs1)[C@@H]1CCCN1C(=O)c1cccs1
(2S)-N-(1,3-thiazol-2-yl)-1-(thiophene-2-carbonyl)pyrrolidine-2-carboxamide