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 photochromic class of molecules.
user
Cc1cc2c(cc1F)N(C)C1(C=Nc3c(cc(N4CCOCC4)c4ccccc34)O1)C21CCCCC1
assistant