Task: Answer the multiple-choice question.
Query: Which drug exhibits a 12.806\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a O=c1c2ccccc2nc(-c2ccc(Cl)c(Cl)c2)n1O
b O=C(c1ccc(Cn2cc(Br)cn2)o1)N1N=C(C(F)F)CC1(O)C(F)F
Answer: a. O=c1c2ccccc2nc(-c2ccc(Cl)c(Cl)c2)n1O
{#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#}
2-(3,4-dichlorophenyl)-3-hydroxyquinazolin-4-one