You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule tert-butyl 5-methyl-9-azatetracyclo[9.2.1.02,10.03,8]tetradeca-3(8),4,6,12-tetraene-9-carboxylate into molecular formula.
user
C19H23NO2
assistant