Task: Answer the MCQ question.
Query: Which compound exhibits a 5.128\% hERG inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any additional words.
Options:
a: CCCCOc1ccc(C(=O)NCC(=O)N(C)CC(=O)Nc2ccc(N3CCOCC3)cc2)cc1
b: CCSc1nnc([C@H](Cc2c[nH]c3ccccc23)NC(=O)OC(C)(C)C)o1
Answer: b. CCSc1nnc([C@H](Cc2c[nH]c3ccccc23)NC(=O)OC(C)(C)C)o1
{#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#}
CCSc1nnc([C@H](Cc2c[nH]c3ccccc23)NC(=O)OC(C)(C)C)o1
CCSc1nnc([C@H](Cc2c[nH]c3ccccc23)NC(=O)OC(C)(C)C)o1
tert-butyl N-[(1S)-1-(5-ethylsulfanyl-1,3,4-oxadiazol-2-yl)-2-(1H-indol-3-yl)ethyl]carbamate