You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-1-[hydroxy-[(2R)-2-hydroxy-3-[hydroxy-[(2R)-3-(11-methyldodecanoyloxy)-2-tetradecanoyloxypropoxy]phosphoryl]oxypropoxy]phosphoryl]oxy-3-(12-methyltetradecanoyloxy)propan-2-yl] icosanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C71H138O17P2
assistant