Task: Answer the multiple choice question.
Query: Which compound has a -20.778\% 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=c1c2ccccc2nc(-c2cccc(Cl)c2)n1O
b COc1cc(Cl)cc(NC(=O)CCN2CCN(C)CC2)c1
Answer: b. COc1cc(Cl)cc(NC(=O)CCN2CCN(C)CC2)c1
{#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#}
N-(3-chloro-5-methoxyphenyl)-3-(4-methylpiperazin-1-yl)propanamide