You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (2R,4R)-5-[tert-butyl(dimethyl)silyl]oxy-4-(methoxymethoxy)-2-[2-[(2-methylpropan-2-yl)oxycarbonyl]hydrazinyl]pentanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H40N2O7Si
assistant