You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(7Z)-3-[(4-chlorophenyl)methyl]-7-[(1-ethylindol-3-yl)methylidene]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H25ClN2O3
assistant