You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
It belongs to the light-emitting class of molecules. Use the above information to create a molecule.
user
c1ccc(-c2nc(-c3ccccc3)nc(-c3cccc(-c4cccc(-c5ccc(-c6ccc7c(c6)C6(CCCCC6)c6ccccc6-7)cc5)c4)c3)n2)cc1
assistant