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 organic light-emitting device and belongs to the phosphorescent class of molecules.
user
CC1(C)c2ccccc2C(c2ccccc2)c2ccc(C3(c4ccc(P(=O)(c5ccccc5)c5ccccc5)cc4)c4ccccc4-c4ccccc43)cc21
assistant