You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a organic light-emitting device. Please write the SMILES representation of it.
user
C1=CC2N=C(c3ccc(-c4ccc(-c5nc6ccccc6c6c(-c7ccccc7)cccc56)cc4)cc3)SC2C=C1
assistant