You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: It belongs to the organic light-emitting device class of molecules.
user
O=P(c1ccccc1)(c1ccccc1)c1cccc(-c2cc3c(c4ccccc24)Oc2cc4ccccc4cc2O3)c1
assistant