Problem statement: Answer the multiple-choice question.
Query: Which compound exhibits a 16.826\% human ether-à-go-go related gene (hERG) inhibition at a concentration of 1uM?
Constraint: You must select none, one or more options from a or b without using any other words.
Options:
a COC(=O)C1C(=O)c2c(C)noc2CC1(C)C
b Cc1cccn2cc(COc3cccc([N+](=O)[O-])c3)nc12
Answer: a. COC(=O)C1C(=O)c2c(C)noc2CC1(C)C
{#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(=O)c2c(C)noc2CC1(C)C
COC(=O)C1C(=O)c2c(C)noc2CC1(C)C
methyl 3,6,6-trimethyl-4-oxo-5,7-dihydro-1,2-benzoxazole-5-carboxylate