Problem statement: Answer the MCQ question.
Query: Which drug exhibits a 21.485\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any other words.
Options:
[a] NC(=O)CCC(C(=O)O)N1C(=O)c2ccc(O)cc2C1=O
[b] CCN=c1sc(C(=O)OC)cc(=O)n1CC
[c] COc1ccccc1OCC(=O)OCc1cc(-c2ccco2)on1
[d] COc1ccc(N(C(=O)COc2ccccc2)C2C=CS(=O)(=O)C2)c(OC)c1
Answer: b. CCN=c1sc(C(=O)OC)cc(=O)n1CC
{#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#}
CCN=c1sc(C(=O)OC)cc(=O)n1CC
CCN=c1sc(C(=O)OC)cc(=O)n1CC
methyl 3-ethyl-2-ethylimino-4-oxo-1,3-thiazine-6-carboxylate