You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: It belongs to the organic light-emitting device class of molecules.
user
BrC1=CC=C(c2cc(-c3ccc(-c4ccccc4)cc3)nc(-c3ccccc3)n2)CC=C1
assistant