You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a member of the organic light-emitting device class, affects electron transport, and is characterized as light-emitting.
user
c1ccc2c(c1)ccc1oc3c(-c4cc(-c5cc6ccccc6c6c5oc5ccc7ccccc7c56)nc(-c5ccc6oc7ccccc7c6c5)n4)cc4ccccc4c3c12
assistant