Problem statement: Answer the multiple choice question.
Query: Which drug has a 20.556\% 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. O=c1[nH]ccc2c(O)cccc12
b. CCCCC(=O)Nc1ccc(NC(=O)c2ccc([N+](=O)[O-])cc2)cc1OC
c. O=C(NCc1ccccc1)Nc1cccn(Cc2ccc(F)cc2)c1=O
Answer: a. O=c1[nH]ccc2c(O)cccc12
{#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=c1[nH]ccc2c(O)cccc12
O=c1[nH]ccc2c(O)cccc12
5-hydroxy-2H-isoquinolin-1-one