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: The molecule is a organic light-emitting device and belongs to the light-emitting class of molecules.
user
c1cc(-c2ccc3cnccc3c2)cc(-c2ccc3c(ccc4c5ccccc5ccc34)c2)c1
assistant