Problem statement: Answer the multiple-choice question.
Question: Which drug has a 3.303\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any additional words.
Options:
[a] S=C1NCCOCCOCCOCCOCCN1
[b] CC(C)=CC(=O)OCC(=O)Nc1ccccc1Cl
[c] Cc1ccc(CN2C(=O)CCC2C(=O)N2CCN(c3ccc(F)cc3)CC2)cc1
[d] Cc1ccccc1[N+](=O)[O-]
Answer: a. S=C1NCCOCCOCCOCCOCCN1
{#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#}
1,9,12,15-tetraoxa-4,6-diazacycloheptadecane-5-thione