You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: It belongs to the organic light-emitting device class of molecules.
user
c1ccc(-c2ccc(-c3ccc(C4=NC(c5ccc(-n6c7cc8ccccc8cc7c7cc8ccccc8cc76)c(-c6ccc7sc8ccccc8c7c6)c5)NC(c5ccc(-c6ccc(-c7ccccc7)cc6)cc5)=N4)cc3)cc2)cc1
assistant