You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is photochromic. Use the above information to create a molecule.
user
COc1ccc(C2(c3ccc(C)cc3)C=Cc3c4c(c5cc(CO)c(OC)cc5c3O2)-c2ccc(C)cc2C4(C)C)cc1
assistant