You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2Z)-2-[(4-ethylphenyl)methylidene]-8-(2-morpholin-4-ylethyl)-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one by IUPAC nomenclature, provide its molecular formula.
user
C25H28N2O4
assistant