Task: Answer the multiple choice question.
Query: Which drug has a 2.270\% 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) Cc1nc(N)nc(Nc2ccc(Cl)cc2)c1Br
(b) Cc1nn(Cc2ccccc2)c(Cl)c1C(=O)NCCc1ccccc1
Answer: a. Cc1nc(N)nc(Nc2ccc(Cl)cc2)c1Br
{#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#}
Cc1nc(N)nc(Nc2ccc(Cl)cc2)c1Br
Cc1nc(N)nc(Nc2ccc(Cl)cc2)c1Br
5-bromo-4-N-(4-chlorophenyl)-6-methylpyrimidine-2,4-diamine