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 light-emitting member of the organic light-emitting device class. Use the above information to create a molecule.
user
c1ccc2cc3c(cc2c1)oc1cc(-c2c4ccccc4c(-c4ccc5ccc6cccc7ccc4c5c67)c4ccccc24)ccc13
assistant