You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-ethoxy-4-[(Z)-[[(2R)-3-methyl-2-[(4-methylphenyl)sulfonylamino]butanoyl]hydrazinylidene]methyl]phenyl] 4-methylbenzenesulfonate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H33N3O7S2
assistant