You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a phosphorescent emitter and is both phosphorescent and belongs to the electroluminescent and organic electroluminescent material classes of molecules.
user
O=P1(c2ccccc2)c2ccccc2-c2ccc3c4ccccc4n(-c4nc(-c5ccccc5)nc(-c5ccccc5)n4)c3c2N1c1ccccc1
assistant