You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a organic electroluminescent device and belongs to the electroluminescent class of molecules. Use the above information to create a molecule.
user
CC1(C)c2ccccc2-c2ccc(-c3cc4cc5c(cc4cn3)C(C)(C)C(C)(C)C5(C)C)cc21
assistant