You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(S)-hydroxy-[(3S,4S,5S)-3,4,5-trihydroxy-5-(hydroxymethyl)oxolan-2-yl]methyl] (E)-octadec-9-enoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H44O8
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