Task: Answer the multiple-choice question.
Question: Which compound exhibits a 20.970\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: CCOc1ccc(CNS(=O)(=O)c2c(C(=O)N3CCCC3)c(C)n(C)c2C)cc1OC
b: Cn1c2ccc(Cl)cc2c2nc3ccccc3nc21
Answer: b. Cn1c2ccc(Cl)cc2c2nc3ccccc3nc21
{#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#}
Cn1c2ccc(Cl)cc2c2nc3ccccc3nc21
Cn1c2ccc(Cl)cc2c2nc3ccccc3nc21
9-chloro-6-methylindolo[3,2-b]quinoxaline