Task: Answer the MCQ question.
Question: Which compound exhibits a 18.346\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a. CNCCc1ccccc1
b. CC(=O)N1CCn2c3c(c4cc(C)ccc42)CCCC31
Answer: a. CNCCc1ccccc1
{#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#}
CNCCc1ccccc1
CNCCc1ccccc1
N-methyl-2-phenylethanamine