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 light-emitting device. Use the above information to create a molecule.
user
CC1(C)c2ccccc2Oc2cc(-c3ccc(-c4nc(-c5ccccc5)nc5ccccc45)cc3)ccc21
assistant