You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(2R,3S,4R,5R)-5-[acetyl-[(Z)-3-oxobut-1-enyl]amino]-2-azido-3,4-dibenzoyloxy-5-methyloxolan-2-yl]methyl benzoate by IUPAC nomenclature, provide its molecular formula.
user
C33H30N4O9
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