You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule [(3R,5S,6R)-5-amino-3,4-dihydroxy-6-[5-oxo-5-(2-oxooctan-3-ylamino)pentoxy]oxan-2-yl]methyl acetate ?
user
C21H38N2O8
assistant