Problem statement: Answer the multiple-choice question.
Query: Which compound exhibits a 6.637\% 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 additional words.
Options:
a: O=C1Nc2ccc([N+](=O)[O-])cc2OC1CCN1CCOCC1
b: CCCCc1nnc(NC(=O)C2CC(=O)N(c3ccc4c(c3)OCCO4)C2)s1
Answer: a. O=C1Nc2ccc([N+](=O)[O-])cc2OC1CCN1CCOCC1
{#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#}
O=C1Nc2ccc([N+](=O)[O-])cc2OC1CCN1CCOCC1
O=C1Nc2ccc([N+](=O)[O-])cc2OC1CCN1CCOCC1
2-(2-morpholin-4-ylethyl)-7-nitro-4H-1,4-benzoxazin-3-one