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 organic light-emitting device class of molecules.
user
c1ccc2cc(-n3c4ccccc4c4cc(-c5ccc6c(c5)c5ccc7ccccc7c5n6-c5cccc6sc7ccccc7c56)ccc43)ccc2c1
assistant