You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-[4-(2-methoxyphenyl)-1,3-thiazol-2-yl]piperidin-1-yl]-4-oxobutanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22N2O4S
assistant