You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
It belongs to the high luminous efficiency class of molecules. Use the above information to create a molecule.
user
C=C(C=CC(C#N)=CCC)c1cc2c3cc4c(cc3c(-c3ccc(C#N)cc3C)cc2c2ccc(C#N)cc12)-c1ccc(-c2ccccc2C#N)c2cccc-4c12
assistant