Task: Answer the multiple-choice question.
Question: Which compound exhibits a 19.487\% 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.) CCn1c(C)c(C)c2cc(C(=O)N3CCc4ccccc4C3)ccc21
b.) CCn1c(=O)c2sccc2n(Cc2ccc(C)cc2)c1=O
Answer: b. CCn1c(=O)c2sccc2n(Cc2ccc(C)cc2)c1=O
{#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#}
CCn1c(=O)c2sccc2n(Cc2ccc(C)cc2)c1=O
CCn1c(=O)c2sccc2n(Cc2ccc(C)cc2)c1=O
3-ethyl-1-[(4-methylphenyl)methyl]thieno[3,2-d]pyrimidine-2,4-dione