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
CC1C=CC=C2C=c3cc(-c4ccc5c(c4)-c4c(C6=NC(c7ccccc7)=CCC(c7ccccc7)=C6)cccc4C54c5ccccc5C(C)(C)c5ccccc54)ccc3=CC21
assistant