You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [(2R,3R,4R,5R,6R)-3,4,6-triacetyloxy-5-[(3-hydroxy-4-methoxypyridine-2-carbonyl)amino]oxan-2-yl]methyl acetate .
user
C21H26N2O12
assistant