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 phosphorescent.
user
Cc1ccccc1-c1nccn1-c1c(C(C)C)cc(-c2ccccc2)cc1C(C)C
assistant