You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(3S,4S)-4-(3-chlorophenoxy)-1-(3-ethyl-1,2-oxazole-5-carbonyl)piperidin-3-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22ClN3O4
assistant