Task: Answer the MCQ question.
Query: Which drug exhibits a 18.877% human ether-à-go-go related gene (hERG) inhibition at a concentration of 10uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a COC(=O)c1ccccc1Oc1cnc2ccccc2n1
b Cc1cc(OCC(=O)Nc2ccc3c(c2)OCCO3)cc(C)c1Cl
Answer: a. COC(=O)c1ccccc1Oc1cnc2ccccc2n1
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: Which {#compound|drug!} {#has|exhibits!} a {herg_central_at_10uM#}{herg_central_at_10uM__units} {herg_central_at_10uM__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_10uM%}
Answer: {%multiple_choice_result}. {SMILES#}
COC(=O)c1ccccc1Oc1cnc2ccccc2n1
COC(=O)c1ccccc1Oc1cnc2ccccc2n1
methyl 2-quinoxalin-2-yloxybenzoate