You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(E,2S,3R)-3-hydroxy-1-[(2R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoctadec-4-en-2-yl]dotriacontanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C56H109NO8
assistant