Task: Answer the multiple-choice question.
Question: Which compound has a 17.499\% 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 CN1CCOCCOc2ccccc2OCCOCC1
b Cc1cc(C(=O)NCc2cc(F)cc3c2OCOC3)nn1C
Answer: a. CN1CCOCCOc2ccccc2OCCOCC1
{#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#}
CN1CCOCCOc2ccccc2OCCOCC1
CN1CCOCCOc2ccccc2OCCOCC1
8-methyl-2,5,11,14-tetraoxa-8-azabicyclo[13.4.0]nonadeca-1(19),15,17-triene