You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: The molecule is a organic light-emitting device.
user
C1=CCC(C2=CC(C3CCCCC3)CC(n3c4c(c5c3CCC(c3ccc6[nH]c7c(c6c3)CCCC7)=C5)CCC=C4)=C2)C=C1
assistant