You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(4R)-2'-amino-5',5'-difluorospiro[2,3-dihydrothiochromene-4,4'-6H-1,3-oxazine]-6-yl]-5-cyanopyridine-2-carboxamide;(4R)-5',5'-difluoro-2,2-dimethylspiro[3H-chromene-4,4'-6H-1,3-oxazine] is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H30F4N6O4S
assistant