You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[2-[(2S,3R)-3-methyl-2-(4-methylphenyl)piperidin-1-yl]sulfonylethyl]-1,2-oxazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H24N2O3S
assistant