Task: Answer the MCQ question.
Question: Which drug exhibits a 6.777\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, or c without using any other words.
Options:
a CN1CCCC1CCNc1ccc2c(=O)c3ccccc3oc2c1
b N#CC1=C(N)N2C(=C(C#N)C13CCN(Cc1ccccc1)CC3)Nc1ccccc12
c O=C(CC(O)c1cccn(-c2ccccc2)c1=S)c1ccccc1O
Answer: a. CN1CCCC1CCNc1ccc2c(=O)c3ccccc3oc2c1
{#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#}
3-[2-(1-methylpyrrolidin-2-yl)ethylamino]xanthen-9-one