You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(2R)-1-[[(2S)-3-[[(2R)-3-decanoyloxy-2-(12-methyltridecanoyloxy)propoxy]-hydroxyphosphoryl]oxy-2-hydroxypropoxy]-hydroxyphosphoryl]oxy-3-(13-methyltetradecanoyloxy)propan-2-yl] 18-methylicosanoate by IUPAC nomenclature, provide its molecular formula.
user
C69H134O17P2
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