Task: Answer the MCQ question.
Query: What is the hERG inhibition at a concentration of 1uM of a compound with the SMILES CCc1c([O-])[n+](-c2ccc(Cl)cc2)c2ccc(-c3ccccc3)nn2c1=O?
Constraint: You must return none, one or more options from a, b, c, or d without using any other words.
Options:
a. 3.441
b. 3.970
c. 13.423
d. 12.542
Answer: a. 3.441\%.
{#Task|Problem statement!}: Answer the {#multiple choice|multiple-choice|MCQ!} question.
{#Question|Query!}: What is the {herg_central_at_1uM__names__noun} of a {#compound|drug!} with the {SMILES__description} {SMILES#}?
Constraint: You must return none, one or more options from {%multiple_choice_enum%2-5%aA1} without using any {#other|additional!} words.
Options:
{herg_central_at_1uM%SMILES%}
Answer: {%multiple_choice_result}. {herg_central_at_1uM#}{herg_central_at_1uM__units}.
CCc1c([O-])[n+](-c2ccc(Cl)cc2)c2ccc(-c3ccccc3)nn2c1=O
CCc1c([O-])[n+](-c2ccc(Cl)cc2)c2ccc(-c3ccccc3)nn2c1=O
1-(4-chlorophenyl)-3-ethyl-4-oxo-7-phenylpyrimido[1,2-b]pyridazin-1-ium-2-olate