You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 5-methyl-2-oxo-7-phenyl-8-oxabicyclo[3.2.1]oct-6-ene-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H22O4
assistant