You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [(2R)-3-[hydroxy-[2-[2-[2-[6-[[2-[[2-[[(2S)-4-methyl-2-[[3-[[(2S)-4-methyl-1-[(2R)-2-methylpyrrolidin-1-yl]-1-oxopentan-2-yl]carbamoyl]oxirane-2-carbonyl]amino]pentanoyl]amino]acetyl]amino]acetyl]amino]hexylamino]-2-oxoethoxy]ethoxycarbonylamino]ethoxy]phosphoryl]oxy-2-octadecanoyloxypropyl] octadecanoate by IUPAC nomenclature, provide its molecular formula.
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C77H141N8O19P
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