You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: It belongs to the anti ulcer class of molecules.
user
COC(=O)c1cn(-c2ccccc2)c(Sc2ccccc2)c1C
assistant