You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): It belongs to the phosphorescent class of molecules.
user
Ic1cccc2c1C1c3ccccc3C2c2c(-c3cc(-c4cccnc4)cc(-c4cccnc4)c3)cccc21
assistant