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
O=C=Nc1ccc(N(c2ccccc2)c2ccc(N(c3ccccc3)c3cccc4c3oc3ccccc34)cc2)cc1
assistant