You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: It belongs to both the light-emitting and high luminous efficiency classes of molecules.
user
CCC(C)(C)c1ccc2c(c1)c1ccccc1n2-c1cccc(-n2c3ccccc3c3cc(C(C)(C)CC)ccc32)c1
assistant