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 based on this description: It belongs to the phosphorescent emitter, phosphorescent, electroluminescent, and organic electroluminescent device classes of molecules.
user
c1ccc(-c2cc(-c3nc4c5c(cccc5n3)-c3ccccc3-4)cc3c4cccc5oc6cccc(c23)c6c54)cc1
assistant