You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[2-[2-[2-[(4R)-3-acetamido-5-[(4R)-3-acetamido-5-[(4S)-4-[3-[(4R)-3-acetamido-4-hydroxy-6-(hydroxymethyl)-5-[(4S,5R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-[[(4S)-3,5-dihydroxy-4-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-[[(4S)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxymethyl]-3,5-dihydroxyoxan-2-yl]oxy-4-hydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-4-hydroxy-6-(hydroxymethyl)oxan-2-yl]oxyethylcarbamoyloxy]ethoxy]ethoxy]ethylphosphonic acid by IUPAC nomenclature, provide its molecular formula.
user
C69H119N4O53P
assistant