Task: Answer the multiple choice question.
Question: Which drug exhibits a 6.600\% hERG inhibition at 1uM?
Constraint: You must select none, one or more options from a, b, c, or d without using any additional words.
Options:
a COc1ccc(C(=O)/C=C(/C)N(C)C)cc1
b CCOC(=O)C(CC)Sc1cc(C)nc2ccc(OC)cc12
c Nc1c(S(=O)(=O)c2cccc(Cl)c2)c2nc3ccccc3nc2n1/N=C/c1ccc(O)c(O)c1
d O=C(COc1ncnc2cc([N+](=O)[O-])ccc12)NCCc1ccc(Cl)cc1
Answer: b. CCOC(=O)C(CC)Sc1cc(C)nc2ccc(OC)cc12
{#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#}
ethyl 2-(6-methoxy-2-methylquinolin-4-yl)sulfanylbutanoate