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: It belongs to the photochromic class of molecules.
user
COc1cc2c(O)cc3c(c2cc1C)-c1cc(C)c(C)cc1C(C)(C)C3(O)c1ccccc1
assistant