You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: It belongs to the light-emitting class of molecules.
user
c1cncc(-c2cc(-c3cccnc3)nc(-c3ccccc3-c3cccc4c3C3(CCCCC3)c3ccccc3-4)c2)c1
assistant