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(-c2nc3ccc(-c4ccc(-c5nc6ccccc6c6c7ccccc7c7ccccc7c56)cc4)cc3s2)cc1
assistant