You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (7Z)-3-(1,1-dioxothiolan-3-yl)-9-methyl-7-[(4-methylphenyl)methylidene]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one .
user
C23H23NO5S
assistant