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 high luminous efficiency, organic light-emitting, and phosphorescent emitter classes of molecules. The molecule is a organic electroluminescent device and belongs to the phosphorescent class of molecules, known to have an effect on luminous efficiency and is characterized as electroluminescent.
user
c1ccc(-c2cc(-c3cccc4ccccc34)nc(-c3ccc(-c4ccc(N(c5ccccc5)c5cccc6ccccc56)cc4)cc3)n2)cc1
assistant