Task: Answer the multiple choice question.
Query: Which compound exhibits a 2.321\% 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. Cn1c(CNc2ccccn2)c(C#N)c2ccccc21
b. Cc1cccc(Cn2c(=O)n(-c3ccc(CC(=O)NCc4ccco4)cc3)c(=O)c3sccc32)c1
c. CC(C)(C)c1cccc(/C=N/O)c1O
d. CCOC(=O)CN/C=C(\C#N)c1ccccc1
Answer: a. Cn1c(CNc2ccccn2)c(C#N)c2ccccc21
{#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#}
1-methyl-2-[(pyridin-2-ylamino)methyl]indole-3-carbonitrile