Task: Answer the multiple-choice question.
Question: Which compound exhibits a -72.491\% 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, b, or c without using any additional words.
Options:
(a) CCCCCn1c(CN2CCN(Cc3ccccc3)CC2)nc2c1c(=O)[nH]c(=O)n2C
(b) CC1(C)CC(=O)C2=C(C1)OC(N)=C(C#N)C2c1cccs1
(c) COc1ccc2c(c1)/C(=C/c1cnc[nH]1)C(=O)N2
Answer: a. CCCCCn1c(CN2CCN(Cc3ccccc3)CC2)nc2c1c(=O)[nH]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#}
8-[(4-benzylpiperazin-1-yl)methyl]-3-methyl-7-pentylpurine-2,6-dione