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 organic electroluminescent material and organic electroluminescent device, belonging to the phosphorescent emitter class of molecules, and is both electroluminescent and phosphorescent.
user
c1ccc(-c2cc(-c3ccccc3)nc(-c3ccc4c(c3)n(-c3ccccc3)c3nc5c(c6ccccc6n5-c5ccccc5)n43)n2)cc1
assistant