Problem statement: Answer the multiple-choice question.
Query: Which compound exhibits a 18.630\% human ether-à-go-go related gene (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] CCCc1nc2c([nH]1)c(=O)n(C)c(=O)n2C
[b] CCCN1Cc2cccc(C(=O)NCc3ccccc3OC)c2C1=O
Answer: a. CCCc1nc2c([nH]1)c(=O)n(C)c(=O)n2C
{#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#}
CCCc1nc2c([nH]1)c(=O)n(C)c(=O)n2C
CCCc1nc2c([nH]1)c(=O)n(C)c(=O)n2C
1,3-dimethyl-8-propyl-7H-purine-2,6-dione