Task: Answer the MCQ question.
Question: Which drug exhibits a 16.346\% 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: CNC(=O)C(=O)NCC1OCCN1S(=O)(=O)c1ccc2c(c1)OCCO2
b: CCONC(=NC)c1nonc1N
c: CC(C)(C)c1ccc(Cn2nc(CC(=O)O)c3ccccc3c2=O)cc1
d: O=C(/C=C/c1ccc(S(=O)(=O)N2CCOCC2)cc1)NCc1ccc(Cl)cc1
Answer: b. CCONC(=NC)c1nonc1N
{#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#}
CCONC(=NC)c1nonc1N
CCONC(=NC)c1nonc1N
4-amino-N-ethoxy-N'-methyl-1,2,5-oxadiazole-3-carboximidamide