You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a photochromic. Please represent the molecule in SMILES.
user
CSc1cc2c3c(c4c(c2cc1SC)-c1ccccc1C41CC(C)(C)CC(C)(C)C1)C=CC(c1ccccc1)(c1ccc(N2CCOCC2)cc1)O3
assistant