You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [1-[2-(4-nitrooxybutoxy)-2-oxoethoxy]-1-oxopropan-2-yl] 2-[2-(2-nitrooxyacetyl)oxyacetyl]oxybenzoate .
user
C20H22N2O16
assistant