You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: It belongs to the phosphorescent, organic light-emitting device, and electroluminescent classes of molecules.
user
c1ccc(-c2ccc3c(c2)c2cc(-c4ccccc4)ccc2n3-c2cccc(-c3cccc(-c4ccc5c6ccccc6c6ccccc6c5c4)c3)n2)cc1
assistant