You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-O-tert-butyl 5-O-methyl 2-[[(2S)-2-acetamido-4-methylpentanoyl]amino]-2-[[(2S)-1-methoxy-4-methyl-1-oxopentan-2-yl]carbamoyl]pentanedioate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H45N3O9
assistant