You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 7-(3-methoxy-3-oxoprop-1-enyl)-4-oxospiro[3H-chromene-2,4'-piperidine]-1'-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27NO6
assistant