Problem statement: Answer the multiple-choice question.
Query: Which drug exhibits a 5.346\% 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) S=C(c1ccc(-c2ccccc2Cl)o1)N1CCOCC1
b) CCCCN(CCCC)c1cn[nH]c(=O)c1Cl
Answer: b. CCCCN(CCCC)c1cn[nH]c(=O)c1Cl
{#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#}
5-chloro-4-(dibutylamino)-1H-pyridazin-6-one