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-(15-methylhexadecanoyloxy)propoxy]-hydroxyphosphoryl]oxy-2-hydroxypropoxy]-hydroxyphosphoryl]oxy-3-(16-methylheptadecanoyloxy)propan-2-yl] nonadecanoate by IUPAC nomenclature, provide its molecular formula.
user
C73H142O17P2
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