You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (2S,5R)-4-hydroxy-2,7-dimethyl-5-[[(2R)-3-methyl-2-(3-methylbutanoylamino)butanoyl]amino]-N-(4-methylpentanoyl)octanamide .
user
C26H49N3O5
assistant