Task: Answer the multiple choice question.
Query: Which compound has a -21.286\% 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: Cn1cnc([N+](=O)[O-])c1Nc1cccc(O)c1
b: CN1C(C(=O)NCc2ccccc2)CC2Cn3c(nc4cc5ccccc5cc43)C21
Answer: b. CN1C(C(=O)NCc2ccccc2)CC2Cn3c(nc4cc5ccccc5cc43)C21
{#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#}
CN1C(C(=O)NCc2ccccc2)CC2Cn3c(nc4cc5ccccc5cc43)C21
CN1C(C(=O)NCc2ccccc2)CC2Cn3c(nc4cc5ccccc5cc43)C21
N-benzyl-7-methyl-2,7,10-triazapentacyclo[9.8.0.02,9.04,8.013,18]nonadeca-1(19),9,11,13,15,17-hexaene-6-carboxamide