You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: It belongs to the photochromic class of molecules.
user
CSc1ccc2c(c1)C1(CC(C)(C)CC(C)(C)C1)c1cc(O)c3cc(SC)c(N4CCOCC4)cc3c1-2
assistant