You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule based on this description: The molecule is a phosphorescent emitter and organic electroluminescent device, belonging to the phosphorescent class of molecules, and is electroluminescent.
user
O=C(c1ccc(-c2ccccc2)cc1)c1ccc2c(c1)c1cccc3c1n2-c1ccccc1C3(c1ccccc1)c1ccccc1
assistant