You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a phosphorescent and belongs to the phosphorescent emitter class of molecules.
user
O=c1c2ccccc2c2cc(-n3c4ccccc4c4cc(-c5ccccc5)ccc43)cc3nc(-c4ccccc4)n1c32
assistant