Task: Answer the MCQ question.
Question: Which drug exhibits a -0.296\% human ether-à-go-go related gene (hERG) inhibition at 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
[a] O=[N+]([O-])c1ccc(NC(=S)NCCc2ccccc2)cc1
[b] COC(=O)CSc1nc2ncccc2[nH]1
Answer: b. COC(=O)CSc1nc2ncccc2[nH]1
{#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#}
COC(=O)CSc1nc2ncccc2[nH]1
COC(=O)CSc1nc2ncccc2[nH]1
methyl 2-(1H-imidazo[4,5-b]pyridin-2-ylsulfanyl)acetate