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 and belongs to the light-emitting class of molecules. Use the above information to create a molecule.
user
COc1ccc2c(c1)sc1c3cc(C(C)C)cc(Cl)c3[nH]c21
assistant