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 class of molecules.
user
CN1c2ccccc2NC1c1ccc(-c2cccc(-c3nc4c(nc5ccccn54)c4ccccc34)c2)cc1
assistant