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: It belongs to the organic light-emitting diode class of molecules.
user
CC1(C)C2=C(C=CCC2)C2=Cc3c(n(-c4ccccc4)c4cc(C5C=C(C6=CC7c8ccccc8SC7C(c7nc(-c8ccccc8)nc(-c8ccccc8)n7)=C6)CCC5)ccc34)CC21
assistant