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: The molecule is photochromic.
user
COc1ccc(C2(c3ccc(OC)cc3)C=Cc3c4c(c5cc6c(cc5c3O2)OC(N2CCOCC2)O6)-c2ccccc2C42CC(C)(C)CC(C)(C)C2)cc1
assistant