You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3R,4R,5R,6R)-6-[[(2R,3R,4R,5S,6R)-3-acetamido-5-hydroxy-6-(hydroxymethyl)-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxymethyl]-2,5-dihydroxy-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-3-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H48N2O21
assistant