You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: It belongs to the light-emitting class of molecules.
user
Cc1ccc2c(c1)c1ccccc1n2-c1ccc(-c2ccccc2-c2ccccc2-c2ccc(-c3nnc(-c4ccccc4)n3-c3ccccc3)cc2)cc1
assistant