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 belongs to the organic electroluminescent device class of molecules; it is phosphorescent and electroluminescent.
user
CC1(C)c2ccccc2-c2cc3c4cc(-n5c6ccccc6c6c7c(ccc65)C(C)(C)C(C)(C)C7(C)C)ccc4n(-c4ccccc4)c3cc21
assistant