You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-N-[(2S)-4-methyl-1-[(2R)-2-methyloxiran-2-yl]-1-oxopentan-2-yl]-2-[2-oxo-2-[(2S)-1-[2-(propan-2-ylamino)acetyl]pyrrolidin-2-yl]ethyl]hexanamide into its molecular formula.
user
C26H45N3O5
assistant