You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methyl (2S,3S,4S,5R,6R)-3,4,5-triacetyloxy-6-[[(2R,3S,4S,5R)-3,4,5,6-tetraacetyloxyoxan-2-yl]methoxy]oxane-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C27H36O19
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