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: The molecule is light-emitting.
user
CCCCCc1ccc2c(c1)C1(C)CCCCC1(C)N2c1ccc2c(c1)C13CC(C)C14C(C)CC34c1cc(N3c4ccc(CCCCC)cc4C4(C)CCCCC34C)ccc1-2
assistant