You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-N-[[3-[3-[(2S,4S,5R,6R)-4-[(dibenzylamino)methyl]-6-[4-(hydroxymethyl)phenyl]-5-methyl-1,3-dioxan-2-yl]phenyl]phenyl]methyl]-2-[(4-methylphenyl)sulfonylamino]-3-phenylpropanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C56H57N3O6S
assistant