You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: The molecule is a organic light-emitting device.
user
c1ccc2c(c1)sc1c2nc2ccc(-c3c4ccccc4c(-c4ccncc4)c4ccccc34)cn21
assistant