You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-(tert-butylamino)-3-[[(6S,7R)-6,7-dihydroxy-5,6,7,8-tetrahydronaphthalen-1-yl]oxy]propan-2-yl] 4-nitrooxybutanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H32N2O8
assistant