You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-ethyl-4,5-dihydroxy-6-[6-methoxy-3,6-dimethyl-2-[(4-methylpiperazin-1-yl)methyl]-4-sulfo-5-(sulfoamino)oxan-3-yl]oxy-3,4,5,6-tetramethyloxane-2-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
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C26H49N3O14S2
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