You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl (4S)-4-acetyl-1,2,6-tritert-butyl-4-phenyl-3-oxatricyclo[3.1.0.02,6]hexane-5-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H44O4
assistant