You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(3R,4S,6R)-6-hydroxy-4,5-di(propanoyloxy)-3-[(2S,4S,5S)-3,4,5-tri(propanoyloxy)-6-(propanoyloxymethyl)oxan-2-yl]oxyoxan-2-yl]methyl propanoate by IUPAC nomenclature, provide its molecular formula.
user
C33H50O18
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