Task: Answer the MCQ question.
Question: Which drug exhibits a 20.141\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a. O=[N+]([O-])c1ccc2[nH]c3c(c2c1)CCCC3O
b. CC(C)[C@H](NC(=O)Nc1ccccc1F)C(=O)O
Answer: a. O=[N+]([O-])c1ccc2[nH]c3c(c2c1)CCCC3O
{#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=[N+]([O-])c1ccc2[nH]c3c(c2c1)CCCC3O
O=[N+]([O-])c1ccc2[nH]c3c(c2c1)CCCC3O
6-nitro-2,3,4,9-tetrahydro-1H-carbazol-1-ol