Task: Answer the multiple-choice question.
Query: Which compound has a 8.420% 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)c1sc2nc3c(c(-c4cccs4)c2c1N)CCCC3
(b) CCOC(=O)c1sc(-c2ccccc2)nc1C
Answer: b. CCOC(=O)c1sc(-c2ccccc2)nc1C
{#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#}
CCOC(=O)c1sc(-c2ccccc2)nc1C
CCOC(=O)c1sc(-c2ccccc2)nc1C
ethyl 4-methyl-2-phenyl-1,3-thiazole-5-carboxylate