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
CC(C)(C)c1ccc2c(-c3ccc4ccccc4c3)c3cc(-c4ccc5c(c4)nc(-c4cc(-c6nc7ccccc7n6-c6ccccc6)cc(-c6nc7ccccc7n6-c6ccccc6)c4)n5-c4ccccc4)ccc3c(-c3ccc4ccccc4c3)c2c1
assistant