You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a member of the organic light-emitting device class and affects electron transport. Please represent the molecule in SMILES.
user
O=P(c1ccccc1)(c1ccccc1)c1cccc(-c2ccc3c(c2)N(c2ccccc2)c2cc4cccc5c4c(c2S3)CC=C5)c1
assistant