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
C=C(C=CC=CC)C1(c2ccccc2)c2cc(-c3cccc4c3sc3ccccc34)ccc2-c2c1c1cccnc1c1ccccc21
assistant