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-(10-methylundecanoyloxy)-2-octadecanoyloxypropoxy]phosphoryl]oxypropoxy]phosphoryl]oxy-3-octadecanoyloxypropan-2-yl] 22-methyltricosanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C81H158O17P2
assistant