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
Fc1cccc(F)c1-c1c2ccccc2c(-c2ccc3c(c2)oc2c(-c4c5ccccc5c(-c5ccccc5)c5ccccc45)cccc23)c2ccccc12
assistant