You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[[1-(1,3-thiazol-2-yl)azetidin-3-yl]methyl]-5,6,7,8-tetrahydrocinnolin-3-one is given. What is its corresponding molecular formula?
user
C15H18N4OS
assistant