Task: Answer the multiple choice question.
Question: Which drug has a 6.894\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
[a] Nc1nc(Cl)cc(-c2ccccc2)n1
[b] COc1ccc(OC)c(/C=N/NC(=O)Cc2nc3ccccc3[nH]2)c1
Answer: a. Nc1nc(Cl)cc(-c2ccccc2)n1
{#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#}
Nc1nc(Cl)cc(-c2ccccc2)n1
Nc1nc(Cl)cc(-c2ccccc2)n1
4-chloro-6-phenylpyrimidin-2-amine