You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-N-[4-[2-[(7-methyl-6-oxooct-7-enoxy)methyl]-2-(2-methylprop-2-enoylamino)-3-[4-(2-methylprop-2-enoylamino)butoxy]propoxy]butyl]prop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H55N3O7
assistant