Task: Answer the multiple-choice question.
Question: Which compound has a 4.644\% 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. CCOC(=O)N=Nc1c(O)n(C)c2ccccc12
b. CCOC(=O)c1nc(NCc2cccc(OC)c2)c2ccccc2n1
Answer: b. CCOC(=O)c1nc(NCc2cccc(OC)c2)c2ccccc2n1
{#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#}
CCOC(=O)c1nc(NCc2cccc(OC)c2)c2ccccc2n1
CCOC(=O)c1nc(NCc2cccc(OC)c2)c2ccccc2n1
ethyl 4-[(3-methoxyphenyl)methylamino]quinazoline-2-carboxylate