Task: Answer the multiple-choice question.
Query: Which drug exhibits a 16.874\% 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: COc1ccc(-c2cc(=O)oc3cc(OCC(=O)NCCN4CCOCC4)ccc23)cc1
b: O=C1NC(c2ccccc2)=CC(c2ccccc2)N1
Answer: b. O=C1NC(c2ccccc2)=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#}
O=C1NC(c2ccccc2)=CC(c2ccccc2)N1
O=C1NC(c2ccccc2)=CC(c2ccccc2)N1
4,6-diphenyl-3,4-dihydro-1H-pyrimidin-2-one