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
c1ccc(-c2sc3cc(N(c4cccc(-c5ccncc5)c4)c4cc5c6ccccc6c(N(c6cccc(-c7ccncc7)c6)c6ccc7c(-c8ccccc8)c(-c8ccccc8)sc7c6)cc5c5ccccc45)ccc3c2-c2ccccc2)cc1
assistant