You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is phosphorescent. Please write the SMILES representation of it.
user
N#Cc1ccc2c3ccccc3n(-c3cccc(-c4cccc(-c5ccc6c7ccccc7c7ccccc7c6c5)c4)c3)c2c1
assistant