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
c1ccc(-c2ncc(-n3c4ccccc4c4c3ccc3c5ccccc5n(-c5ccccn5)c34)s2)cc1
assistant