You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1Z)-5,7-dioxa-12-azatetracyclo[10.5.2.02,10.04,8]nonadeca-1(17),2,4(8),9-tetraen-13-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H17NO3
assistant