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: It belongs to the organic light-emitting device class of molecules. Please represent the molecule in SMILES.
user
Cc1cc(C)c2ccc3ccc(-c4ccc(C5(c6ccc(-c7ccc8ccc9c(C)cc(C)nc9c8n7)cc6)c6cc(-c7ccccc7)ccc6-c6ccc(-c7ccccc7)cc65)cc4)nc3c2n1
assistant