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 light-emitting device and belongs to the organic light-emitting class of molecules. Use the above information to create a molecule.
user
c1ccc(-c2cccc(-c3nc(-c4ccccc4)nc(-c4ccc5c(c4)C4(c6cc(-c7cccc8cccnc78)ccc6S5)c5ccccc5-c5ccccc54)n3)c2)cc1
assistant