Problem statement: Answer the multiple-choice question.
Question: Which drug exhibits a 6.991\% 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: Nc1ncnc2c1ncn2CCN1CCOCC1
b: Cc1ccc(/C=C2\SC(=S)N(/N=C/c3cc([N+](=O)[O-])ccc3O)C2=O)o1
Answer: a. Nc1ncnc2c1ncn2CCN1CCOCC1
{#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#}
Nc1ncnc2c1ncn2CCN1CCOCC1
Nc1ncnc2c1ncn2CCN1CCOCC1
9-(2-morpholin-4-ylethyl)purin-6-amine