Problem statement: Answer the multiple-choice question.
Question: Which drug has a 2.570\% 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 other words.
Options:
a. COc1cccc(NC(=O)c2ccccc2NS(C)(=O)=O)c1
b. O=C(NCc1ccc2c(c1)OCO2)c1ccc(CN2CCOCC2)cc1
c. O=C(NCc1cc(C(F)(F)F)cc(C(F)(F)F)c1)C1CC(c2ccccc2[N+](=O)[O-])=NO1
d. CCCCn1nnnc1NCc1cccc(OC)c1OC
Answer: d. CCCCn1nnnc1NCc1cccc(OC)c1OC
{#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#}
CCCCn1nnnc1NCc1cccc(OC)c1OC
CCCCn1nnnc1NCc1cccc(OC)c1OC
1-butyl-N-[(2,3-dimethoxyphenyl)methyl]tetrazol-5-amine