You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): The molecule is photochromic.
user
CC(C)(C)c1ccc(-c2oc3cc(O)c(O)cc3c2C2=C(c3cc(-c4ccc(C(C)(C)C)s4)sc3-c3ccc(C(C)(C)C)s3)C(F)(F)C(F)(F)C2(F)F)cc1
assistant