You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4aR,8aS)-6-[4-(4-fluorophenyl)sulfonyl-1-oxa-4,9-diazaspiro[5.5]undecane-9-carbonyl]-4,4a,5,7,8,8a-hexahydropyrido[4,3-b][1,4]oxazin-3-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H29FN4O6S
assistant