You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R,5R,7R)-3,4-diethyl-7-[[5-fluoro-2-(5-fluoro-1H-pyrrolo[2,3-b]pyridin-3-yl)pyrimidin-4-yl]methyl]-1-oxa-3-azaspiro[4.5]decan-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H27F2N5O2
assistant