You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: It has effects on both low driving voltage and luminous efficiency.
user
c1ccc(Nc2ccccc2-c2cccc(-c3cccc(-c4cccc(-c5ccc(-c6cccc7c6oc6ccccc67)cc5)c4)c3)c2)cc1
assistant