You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: The molecule is a organic light-emitting device and belongs to the phosphorescent class of molecules, impacting electron transport.
user
c1ccc(-c2ccc3c4ccc(-c5nc(-c6ccccc6)nc(-n6c7ccccc7c7ncccc76)n5)cc4c4ccccc4c3c2)cc1
assistant