Task: Answer the multiple choice question.
Question: Which drug exhibits a -2.696\% 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 additional words.
Options:
a) CCOC(=O)c1nnsc1-c1ccc(-c2snnc2C(=O)OCC)cc1
b) Cc1ccc(S(=O)(=O)N2CCCCC2)cc1NC(=O)COC(=O)C1(C)CC1(Cl)Cl
Answer: a. CCOC(=O)c1nnsc1-c1ccc(-c2snnc2C(=O)OCC)cc1
{#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#}
CCOC(=O)c1nnsc1-c1ccc(-c2snnc2C(=O)OCC)cc1
CCOC(=O)c1nnsc1-c1ccc(-c2snnc2C(=O)OCC)cc1
ethyl 5-[4-(4-ethoxycarbonylthiadiazol-5-yl)phenyl]thiadiazole-4-carboxylate