Task: Answer the multiple choice question.
Query: Which compound exhibits a -21.646\% human ether-à-go-go related gene (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) Cc1cc(C)c2c(n1)nn1c(NCCCN(C)C)cc(C)nc21
(b) O=C(CN1CCN(c2ccccc2)CC1)Nc1ccc(F)cc1
Answer: b. O=C(CN1CCN(c2ccccc2)CC1)Nc1ccc(F)cc1
{#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=C(CN1CCN(c2ccccc2)CC1)Nc1ccc(F)cc1
O=C(CN1CCN(c2ccccc2)CC1)Nc1ccc(F)cc1
N-(4-fluorophenyl)-2-(4-phenyl-1,4-diazinan-1-yl)acetamide