You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Could you please return a molecule that adheres to this description? The molecule is a organic light-emitting device that impacts electron transport.
user
C1=Cc2c(ccc3c4ccncc4n(-c4nc(-c5ccccc5)nc(-c5ccccc5)n4)c23)Oc2cnccc21
assistant