Task: Answer the multiple-choice question.
Question: Which drug exhibits a 3.308\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
a. N#Cc1nc(-c2ccc(OCc3ccccc3)cc2)oc1NCCCN1CCOCC1
b. O=C1Nc2ccccc2C1=O
c. Nc1nnc(Cc2ccc(Cl)cc2Cl)s1
d. CC(=O)Nc1cc(C(=O)OCC(=O)c2ccc(C)cc2)ccc1C
Answer: b. O=C1Nc2ccccc2C1=O
{#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=C1Nc2ccccc2C1=O
O=C1Nc2ccccc2C1=O
1H-indole-2,3-dione