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 phosphorescent emitter and phosphorescent, belonging to the organic electroluminescent device class of molecules, and is electroluminescent.
user
Brc1cccc2oc3ccc(-n4c5ccccc5c5ccc6c7ccccc7oc6c54)cc3c12
assistant