Task: Answer the multiple choice question.
Query: Which drug exhibits a 8.491\% 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) O=C(Nc1ncccc1O)c1ccc(Cl)c(S(=O)(=O)N2CCCCC2)c1
(b) CCOC(=O)c1cn2nc(Oc3ccccc3)ccc2n1
Answer: b. CCOC(=O)c1cn2nc(Oc3ccccc3)ccc2n1
{#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#}
CCOC(=O)c1cn2nc(Oc3ccccc3)ccc2n1
CCOC(=O)c1cn2nc(Oc3ccccc3)ccc2n1
ethyl 6-phenoxyimidazo[1,2-b]pyridazine-2-carboxylate