Task: Answer the multiple choice question.
Question: Which drug exhibits a 20.362\% 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] CCOC(=O)c1c(-c2ccccc2)nc2ccc(Cl)cn12
[b] COc1ccc(-n2nnc3c(=O)n(CC(=O)N4CCC(Cc5ccccc5)CC4)cnc32)cc1
Answer: a. CCOC(=O)c1c(-c2ccccc2)nc2ccc(Cl)cn12
{#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#}
CCOC(=O)c1c(-c2ccccc2)nc2ccc(Cl)cn12
CCOC(=O)c1c(-c2ccccc2)nc2ccc(Cl)cn12
ethyl 6-chloro-2-phenylimidazo[1,2-a]pyridine-3-carboxylate