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 that fulfills the requirement: The molecule is a phosphorescent.
user
CCC(c1ccc2ccccc2c1)c1ccc2ccccc2c1-c1cc2c3ccc(-c4ccccc4)cc3n(-c3ccc(-c4nc(-c5ccccc5)nc(-c5ccccc5)n4)c4ccccc34)c2cc1C
assistant