You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(6aS,9aS)-5,6,6a,7,9,9a-hexahydro-2H-furo[3,4-b][1,4]oxazocine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C8H13NO2
assistant