You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Could you please return a molecule that adheres to this description? It belongs to the organic light-emitting device class of molecules.
user
CC1(C)c2cc(C#N)ccc2-c2ccc(-c3ccc(-c4cc5c(-c6ccccc6)nc6cc7ccccc7cc6c5c5ccccc45)cc3)cc21
assistant