You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-3-[2,5-dioxo-1-[3-oxo-7-[(2R,4R,5S)-3,4,5-trihydroxy-6-(hydroxymethyl)-5-[(2S,4S,5R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxyheptyl]pyrrolidin-3-yl]sulfanyl-2-[[2-[[2-[[(2R)-3-[2,5-dioxo-1-[3-oxo-7-[(2R,4R,5S)-3,4,5-trihydroxy-6-(hydroxymethyl)-5-[(2S,4S,5R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxyheptyl]pyrrolidin-3-yl]sulfanyl-2-[[2-[[2-[[(2R)-3-[2,5-dioxo-1-[3-oxo-7-[(2R,4R,5S)-3,4,5-trihydroxy-6-(hydroxymethyl)-5-[(2S,4S,5R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxyheptyl]pyrrolidin-3-yl]sulfanyl-2-[(2-methoxyacetyl)amino]propanoyl]amino]acetyl]amino]acetyl]amino]propanoyl]amino]acetyl]amino]acetyl]amino]propanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C89H138N10O55S3
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