Task: Answer the multiple choice question.
Query: Which compound exhibits a -19.904\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a.) COc1cc(O)oc1C=Nc1ccccc1
b.) Cc1sc2nc(CSC(C)C(=O)Nc3ccc(C#N)cc3)[nH]c(=O)c2c1C
Answer: a. COc1cc(O)oc1C=Nc1ccccc1
{#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#}
COc1cc(O)oc1C=Nc1ccccc1
COc1cc(O)oc1C=Nc1ccccc1
4-methoxy-5-(phenyliminomethyl)furan-2-ol