Task: Answer the multiple-choice question.
Query: Which compound exhibits a 2.754\% 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 COC(=O)c1c(C)nc(C)c2c(=O)oc3ccccc3c12
b COc1ccc(NC(=O)C2CC(=O)n3ncnc3N2)cc1
Answer: a. COC(=O)c1c(C)nc(C)c2c(=O)oc3ccccc3c12
{#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)c1c(C)nc(C)c2c(=O)oc3ccccc3c12
COC(=O)c1c(C)nc(C)c2c(=O)oc3ccccc3c12
methyl 2,4-dimethyl-5-oxochromeno[3,4-c]pyridine-1-carboxylate