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 is electroluminescent. Use the above information to create a molecule.
user
OC1(c2ccccc2-c2ccc3c(c2)-c2ccccc2C3)c2ccccc2-c2c(Br)cccc21
assistant