You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [2-[[(1S)-3-methyl-1-phenylbutyl]amino]-2-oxoethyl] 4-(difluoromethoxy)-3-methoxybenzoate by IUPAC nomenclature, provide its molecular formula.
user
C22H25F2NO5
assistant