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 phosphorescent molecule has an effect on low driving voltage.
user
c1ccc2c(c1)ccc1c3c4ccccc4c4c5ccccc5sc4c3n(-c3nc(-c4ccc5sc6ccccc6c5c4)c4ccccc4n3)c21
assistant