You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
benzyl (3aS,7aS)-2-oxo-3,3a,5,6,7,7a-hexahydrofuro[3,2-b]pyridine-4-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H17NO4
assistant