You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (3S,4S,6R)-3-[(2R,3R,4S,5R,6R)-5-[2-[3-[7-[[(3S,6S)-6-[(4-carbamimidoylphenyl)methyl]-3-[(4-methoxy-2,3,6-trimethylphenyl)sulfonylamino]-4,7-dioxo-7-piperidin-1-ylheptanoyl]amino]-4-oxoheptoxy]propoxymethoxy]ethoxy]-3,4-dimethoxy-6-(sulfooxymethyl)oxan-2-yl]oxy-6-[(2R,3R,4S,5R,6R)-6-[(3S,4S,6R)-2-carboxy-6-[(2R,3R,4S,5R,6S)-4,6-dimethoxy-5-sulfooxy-2-(sulfooxymethyl)oxan-3-yl]oxy-4,5-dimethoxyoxan-3-yl]oxy-4,5-disulfooxy-2-(sulfooxymethyl)oxan-3-yl]oxy-4,5-dimethoxyoxane-2-carboxylic acid is given. What is its corresponding molecular formula?
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C81H127N5O56S7
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