You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,2S,6S,7S,8R)-8-(2-methoxyethoxymethoxy)-5-phenyl-3-oxa-4-azatricyclo[5.2.1.02,6]dec-4-ene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H23NO4
assistant